Update actions/github-script action to v9

Author: renovate[bot]

.github/workflows/check-antares-update.yml

@@ -66,7 +66,7 @@ jobs:
 
       - name: Create GitHub Issue
         if: steps.compare.outputs.update == 'true'
-        uses: actions/github-script@v7
+        uses: actions/github-script@v9
         with:
           script: |
             const latest = '${{ steps.latest.outputs.version }}';

.github/workflows/notify-pypsa-models-update.yml

@@ -44,7 +44,7 @@ jobs:
 
       - name: Create issue in air-quality repo
         if: steps.version.outputs.changed == 'true'
-        uses: actions/github-script@v7
+        uses: actions/github-script@v9
         with:
           github-token: ${{ secrets.AIR_QUALITY_REPO_PAT }}
           script: |