Merge pull request #607 from wp-cli/dependabot/github_actions/actions/checkout-6

Author: swissspidy

.github/workflows/regenerate-handbook.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out source code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Set up PHP
         uses: shivammathur/setup-php@v2