Update .gitea/workflows/yaml-lint.yml

.gitea/workflows/yaml-lint.yml

@@ -22,6 +22,11 @@ jobs:
       - name: Dump Gitea env
         run: |
           env | sort | grep GITEA
+      - name: Get base branch name
+        id: base
+        run: |
+          base_ref=$(jq -r '.pull_request.base.ref' "$GITEA_PATH")
+          echo "base_ref=$base_ref" >> $GITHUB_OUTPUT
       - name: Get changed files other method
         run: |
           git fetch origin $GITEA_BASE_REF