Do not sync nightly

.forgejo/workflows/mirror-repository.yml

@@ -24,7 +24,7 @@ jobs:
           token: ${{ secrets.CODE_FORGEJO_TOKEN }}
       - name: Missing tag detecting
         run: |
-          git ls-remote $upstream "refs/tags/$tags" | grep -v '{' | sed 's|.*/||' > upstream_tags
+          git ls-remote $upstream "refs/tags/$tags" | grep -v '{' | sed 's|.*/||' | grep -v "nightly" > upstream_tags
           git ls-remote ${{ github.server_url}}/${{ github.repository }} "refs/tags/$tags" | grep -v '{' | sed 's|.*/||' > destination_tags
           cat upstream_tags destination_tags | tr ' ' '\n' | sort | uniq -u > missing_tags
           echo "Missing tags:"