Update sync_lab_release.yml

Author: mbektas

.github/workflows/sync_lab_release.yml

@@ -29,11 +29,25 @@ jobs:
         run: |
           python -m pip install tbump
 
+      - name: 'Get latest JupyterLab version'
+        uses: actions/github-script@v7
+        id: get-latest-jupyterlab-version
+        with:
+          github-token: ${{ secrets.JLAB_APP_TOKEN }}
+          script: |
+            const releases = await github.rest.repos.listReleases({
+              owner: "jupyterlab",
+              repo: "jupyterlab"
+            })
+            const latestRelease = releases.data.find(release => release.tag_name.startsWith('v') && !(release.draft || release.prerelease))
+            return latestRelease ? latestRelease.tag_name.substring(1) : ''
+          result-encoding: string
+
       - name: Check for new releases
         shell: bash
         run: |
           set -eux
-          export LATEST=$(python scripts/get_latest_lab_version.py)
+          export LATEST=${{ steps.get-latest-jupyterlab-version.outputs.result }}
           echo "latest=${LATEST}" >> $GITHUB_ENV
           tbump --only-patch ${LATEST}-1 --non-interactive
           if [[ ! -z "$(git status --porcelain package.json)" ]]; then