chore(deps): update actions/checkout action to v7

Author: renovate[bot]

.github/workflows/release-pr.yml

@@ -17,7 +17,7 @@ jobs:
     if: github.repository == 'apollographql/apollo-server'
     steps:
       - name: Checkout Repo
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
         with:
           # This makes Actions fetch all Git history so that Changesets can generate changelogs with the correct commits
           fetch-depth: 0