chore: docs: prepare 4.3.5 release

Author: dtrudg

CHANGELOG.md

@@ -1,5 +1,15 @@
 # SingularityCE Changelog
 
+## 4.3.5 \[2025-12-02\]
+
+### Security Related Fixes
+
+- Fix for [CVE-2025-64750 /
+  GHSA-wwrx-w7c9-rf87](https://github.com/sylabs/singularity/security/advisories/GHSA-wwrx-w7c9-rf87)
+  Ineffective application of selinux / apparmor LSM process labels via the
+  `--security` flag.
+- Dependencies updated.
+
 ## 4.3.4 \[2025-10-14\]
 
 ### Security Related Fixes

INSTALL.md

@@ -227,11 +227,11 @@ git submodule update --init
 By default your clone will be on the `main` branch which is where development
 of SingularityCE happens. To build a specific version of SingularityCE, check
 out a [release tag](https://github.com/sylabs/singularity/tags) before
-compiling. E.g. to build the 4.3.3 release, checkout the
-`v4.3.3` tag:
+compiling. E.g. to build the 4.3.5 release, checkout the
+`v4.3.5` tag:
 
 ```sh
-git checkout --recurse-submodules v4.3.3
+git checkout --recurse-submodules v4.3.5
 ```
 
 ## Compiling SingularityCE