Enhance auto_check workflow with stability check

Added steps to check for stable latest release before bumping upstream.

Author: chuygarcia92

.github/workflows/auto_check.yml

@@ -12,7 +12,18 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - run: npx @dappnode/dappnodesdk github-action bump-upstream
+
+      - name: Check if latest release is stable
+        id: check
+        run: |
+          RELEASE=$(curl -s -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
+            https://api.github.com/repos/nextcloud/server/releases/latest)
+          PRERELEASE=$(echo "$RELEASE" | jq -r '.prerelease')
+          echo "prerelease=$PRERELEASE" >> $GITHUB_OUTPUT
+
+      - name: Bump upstream (stable only)
+        if: steps.check.outputs.prerelease == 'false'
+        run: npx @dappnode/dappnodesdk github-action bump-upstream
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           PINATA_API_KEY: ${{ secrets.PINATA_API_KEY }}