Update README.md

Author: losh11

README.md

@@ -15,13 +15,13 @@ A litecoin-core docker image with support for the following platforms:
 
 **Multi-architecture builds**
 
-The newest images (Debian-based, *0.19+*) provide built-in support for multiple architectures. Running `docker pull` on any of the supported platforms will automatically choose the right image for you as all of the manifests and artifacts are pushed to the Docker registry.
+The newest images (Debian-based, *0.21+*) provide built-in support for multiple architectures. Running `docker pull` on any of the supported platforms will automatically choose the right image for you as all of the manifests and artifacts are pushed to the Docker registry.
 
 **Picking the right tag**
 
 - `litecoinproject/litecoin-core:latest`: points to the latest stable release available of Litecoin Core. Caution when using in production as blindly upgrading Litecoin Core is a risky procedure.
 - `litecoinproject/litecoin-core:alpine`: same as above but using the Alpine Linux distribution (a resource efficient Linux distribution with security in mind, but not officially supported by the Litecoin Core team — use at your own risk).
-- `litecoinproject/litecoin-core:<version>`: based on a slim Debian image, this tag format points to a specific version branch (e.g. `0.20`) or release of Litecoin Core (e.g. `0.20.1`). Uses the pre-compiled binaries which are distributed by the Litecoin Core team.
+- `litecoinproject/litecoin-core:<version>`: based on a slim Debian image, this tag format points to a specific version branch (e.g. `0.21`) or release of Litecoin Core (e.g. `0.21.2.2`). Uses the pre-compiled binaries which are distributed by the Litecoin Core team.
 - `litecoinproject/litecoin-core:<version>-alpine`: same as above but using the Alpine Linux distribution.
 
 ## What is Litecoin Core?