fix(ci): pin goreleaser to v2.13.3 for Gitea SDK compatibility

GoReleaser v2.14.0 upgraded the Gitea SDK from v0.22.1 to v0.23.2,
which fails to parse the Gitea server version during homebrew cask
publishing (error: unknown version: daf0483). Pin to v2.13.3 until
the Gitea server is updated to a compatible version.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitea/workflows/goreleaser.yaml

@@ -24,7 +24,7 @@ jobs:
       - name: Install goreleaser
         uses: goreleaser/goreleaser-action@v7
         with:
-          version: '~> v2'
+          version: 'v2.13.3'
           install-only: true
       - name: Release
         run: |