Go: Retrofit the change log to mention Go 1.25

This can only be a minor change (or something similar) to stay within the
semantic versioning contraints. This is because only the patch version of
the Go ql library pack was bumped during the release. Since there were no new
language features in Go 1.25, this might also be the most accurate choice here.

Author: jketema

go/ql/lib/CHANGELOG.md

@@ -4,7 +4,9 @@ No user-facing changes.
 
 ## 4.3.2
 
-No user-facing changes.
+### Minor Analysis Improvements
+
+* Go 1.25 is now supported.
 
 ## 4.3.1
 

go/ql/lib/change-notes/released/4.3.2.md

@@ -1,3 +1,5 @@
 ## 4.3.2
 
-No user-facing changes.
+### Minor Analysis Improvements
+
+* Go 1.25 is now supported.