Bump actions/github-script from 6 to 7 (#139)

Bumps [actions/github-script](https://github.com/actions/github-script) from 6 to 7.
- [Release notes](https://github.com/actions/github-script/releases)
- [Commits](actions/github-script@v6...v7)

---
updated-dependencies:
- dependency-name: actions/github-script
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/size.yml

@@ -22,7 +22,7 @@ jobs:
       - name: remove old size labels
         if:  ${{ steps.size.outputs.stale_labels != '' }}
         continue-on-error: true ## don't fail CI checks even if labelling fails for some reasons
-        uses: actions/github-script@v6
+        uses: actions/github-script@v7
         with:
           script: |
             const stale_labels = `${{ steps.size.outputs.stale_labels }}`;
@@ -41,7 +41,7 @@ jobs:
       - name: apply new size label
         if:  ${{ steps.size.outputs.new_label != '' }}
         continue-on-error: true ## don't fail CI checks even if labelling fails for some reasons
-        uses: actions/github-script@v6
+        uses: actions/github-script@v7
         with:
           script: |
             github.rest.issues.addLabels({