chore(deps): update actions/checkout action to v5 (#2630)

Author: nedtwigg

.github/workflows/claude.yml

@@ -52,7 +52,7 @@ jobs:
       id-token: write
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 1