Add v5.5 audit report (#6055)

Author: ernestognw

audits/2025-10-v5.5.pdf

@@ -1,16 +1,17 @@
 # Audits
 
-| Date          | Version | Commit                                                                           | Auditor      | Scope                | Links                                                       |
-| ------------- | ------- | -------------------------------------------------------------------------------- | ------------ | -------------------- | ----------------------------------------------------------- |
-| July 2025     | v5.4.0  | [`f6fea85`](https://github.com/openzeppelin/openzeppelin-contracts/tree/f6fea85) | OpenZeppelin | v5.4 Changes         | [🔗](./2025-07-v5.4.pdf)                                    |
-| April 2025    | v5.3.0  | [`d4b2e98`](https://github.com/openzeppelin/openzeppelin-contracts/tree/d4b2e98) | OpenZeppelin | v5.3 Changes         | [🔗](./2025-04-v5.3.pdf)                                    |
-| December 2024 | v5.2.0  | [`98d28f9`](https://github.com/openzeppelin/openzeppelin-contracts/tree/98d28f9) | OpenZeppelin | v5.2 Changes         | [🔗](./2024-12-v5.2.pdf)                                    |
-| October 2024  | v5.1.0  | [`aba9ff6`](https://github.com/openzeppelin/openzeppelin-contracts/tree/aba9ff6) | OpenZeppelin | v5.1 Changes         | [🔗](./2024-10-v5.1.pdf)                                    |
-| October 2023  | v5.0.0  | [`b5a3e69`](https://github.com/openzeppelin/openzeppelin-contracts/tree/b5a3e69) | OpenZeppelin | v5.0 Changes         | [🔗](./2023-10-v5.0.pdf)                                    |
-| May 2023      | v4.9.0  | [`91df66c`](https://github.com/openzeppelin/openzeppelin-contracts/tree/91df66c) | OpenZeppelin | v4.9 Changes         | [🔗](./2023-05-v4.9.pdf)                                    |
-| October 2022  | v4.8.0  | [`14f98db`](https://github.com/openzeppelin/openzeppelin-contracts/tree/14f98db) | OpenZeppelin | ERC4626, Checkpoints | [🔗](./2022-10-ERC4626.pdf) [🔗](./2022-10-Checkpoints.pdf) |
-| October 2018  | v2.0.0  | [`dac5bcc`](https://github.com/openzeppelin/openzeppelin-contracts/tree/dac5bcc) | LevelK       | Everything           | [🔗](./2018-10.pdf)                                         |
-| March 2017    | v1.0.4  | [`9c5975a`](https://github.com/openzeppelin/openzeppelin-contracts/tree/9c5975a) | New Alchemy  | Everything           | [🔗](./2017-03.md)                                          |
+| Date          | Version | Commit                                                                           | Auditor      | Scope                              | Links                                                       |
+| ------------- | ------- | -------------------------------------------------------------------------------- | ------------ | ---------------------------------- | ----------------------------------------------------------- |
+| October 2025  | v5.5.0  | [`f5edfc0`](https://github.com/openzeppelin/openzeppelin-contracts/tree/f5edfc0) | OpenZeppelin | SafeERC20, ECDSA, SignatureChecker | [🔗](./2025-10-v5.5.pdf)                                    |
+| July 2025     | v5.4.0  | [`f6fea85`](https://github.com/openzeppelin/openzeppelin-contracts/tree/f6fea85) | OpenZeppelin | v5.4 Changes                       | [🔗](./2025-07-v5.4.pdf)                                    |
+| April 2025    | v5.3.0  | [`d4b2e98`](https://github.com/openzeppelin/openzeppelin-contracts/tree/d4b2e98) | OpenZeppelin | v5.3 Changes                       | [🔗](./2025-04-v5.3.pdf)                                    |
+| December 2024 | v5.2.0  | [`98d28f9`](https://github.com/openzeppelin/openzeppelin-contracts/tree/98d28f9) | OpenZeppelin | v5.2 Changes                       | [🔗](./2024-12-v5.2.pdf)                                    |
+| October 2024  | v5.1.0  | [`aba9ff6`](https://github.com/openzeppelin/openzeppelin-contracts/tree/aba9ff6) | OpenZeppelin | v5.1 Changes                       | [🔗](./2024-10-v5.1.pdf)                                    |
+| October 2023  | v5.0.0  | [`b5a3e69`](https://github.com/openzeppelin/openzeppelin-contracts/tree/b5a3e69) | OpenZeppelin | v5.0 Changes                       | [🔗](./2023-10-v5.0.pdf)                                    |
+| May 2023      | v4.9.0  | [`91df66c`](https://github.com/openzeppelin/openzeppelin-contracts/tree/91df66c) | OpenZeppelin | v4.9 Changes                       | [🔗](./2023-05-v4.9.pdf)                                    |
+| October 2022  | v4.8.0  | [`14f98db`](https://github.com/openzeppelin/openzeppelin-contracts/tree/14f98db) | OpenZeppelin | ERC4626, Checkpoints               | [🔗](./2022-10-ERC4626.pdf) [🔗](./2022-10-Checkpoints.pdf) |
+| October 2018  | v2.0.0  | [`dac5bcc`](https://github.com/openzeppelin/openzeppelin-contracts/tree/dac5bcc) | LevelK       | Everything                         | [🔗](./2018-10.pdf)                                         |
+| March 2017    | v1.0.4  | [`9c5975a`](https://github.com/openzeppelin/openzeppelin-contracts/tree/9c5975a) | New Alchemy  | Everything                         | [🔗](./2017-03.md)                                          |
 
 # Formal Verification