Add link to PR deprecating add-snippets to CHANGELOG.md

Co-authored-by: Andrew Eisenberg <aeisenberg@github.com>

CHANGELOG.md

@@ -8,7 +8,7 @@ Note that the only difference between `v2` and `v3` of the CodeQL Action is the
 
 - _Deprecation:_ Swift analysis on Ubuntu runner images is no longer supported. Please migrate to a macOS runner if this affects you. [#2403](https://github.com/github/codeql-action/pull/2403)
 - Bump the minimum CodeQL bundle version to 2.13.5. [#2408](https://github.com/github/codeql-action/pull/2408)
-- _Deprecation:_ The `add-snippets` input on the `analyze` Action is deprecated and will be removed in the first release in August 2025.
+- _Deprecation:_ The `add-snippets` input on the `analyze` Action is deprecated and will be removed in the first release in August 2025. [#2436](https://github.com/github/codeql-action/pull/2436)
 
 ## 3.25.15 - 26 Jul 2024