ci: pin the shared workflow to v1

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.gitea/workflows/build.yaml

@@ -3,6 +3,6 @@ on:
   push:
 jobs:
   lint:
-    uses: self:KofTwentyTwo/ci-workflows/.gitea/workflows/lint.yaml@main
+    uses: self:KofTwentyTwo/ci-workflows/.gitea/workflows/lint.yaml@v1
     with:
       yamllint: '*.yaml'