fix: quote YAML step name containing colon

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: EMaher

.github/workflows/issue-labels-migrate.yml

@@ -12,7 +12,7 @@ jobs:
   migrate:
     runs-on: ubuntu-latest
     steps:
-      - name: Rename legacy labels to type: equivalents
+      - name: "Rename legacy labels to type: equivalents"
         uses: actions/github-script@v7
         with:
           script: |