Deleted unneeded quotes

Author: adamlui

.github/workflows/lint-on-push-pr.yml

@@ -15,7 +15,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v6.2.0
         with:
-          python-version: '3.x'
+          python-version: 3.x
 
       - name: Install dev dependencies
         run: pip install -r requirements-dev.txt

.github/workflows/update-root-downloads-shield-weekly.yml

@@ -23,7 +23,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v6.2.0
         with:
-          python-version: '3.x'
+          python-version: 3.x
 
       - name: Update README shield
         id: update_shield