Fix: Add link to v5.0.0 release details

Updated README to reflect changes in versioning and architecture support.

Author: bokysan

README.md

@@ -16,6 +16,7 @@ Feel free to pick your favourite distro.
   - [Description](#description)
   - [TL;DR](#tldr)
   - [Updates](#updates)
+    - [vv.0.0](#v500)
     - [v4.0.0](#v400)
     - [v3.0.0](#v300)
   - [Architectures](#architectures)
@@ -128,7 +129,7 @@ Image has been updated to [Debian Trixie](https://www.debian.org/releases/trixie
 failures during upgrade, major version has been bumped. New versions of go do not provide images for `linux/arm/v5` and it's not really
 supported that wall on Debian any more, so this architecture is dropped as well.
 
-Several other fixes went into this release as well.
+Several other fixes went into this release as well. Full list is available on the [releases](https://github.com/bokysan/docker-postfix/releases/tag/v5.0.0) page.
 
 ### v4.0.0