build: exclude release commits from goreleaser changelog

Add '^release:' pattern to changelog skip filters to prevent
release-related commits from appearing in generated changelogs.

Author: orien

.goreleaser.yml

@@ -64,6 +64,7 @@ changelog:
       - '^ci:'
       - '^chore:'
       - '^build:'
+      - '^release:'
   groups:
     - title: Features
       regexp: '^.*?feat(\([[:word:]]+\))??!?:.+$'