Update .github/workflows/generate-references.yaml

Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>

Author: gewenyu99

.github/workflows/generate-references.yaml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout the repository
-        uses: actions/checkout@85e6279cec87321a52edac9c87bce653a07cf6c2
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
           token: ${{ secrets.POSTHOG_BOT_GITHUB_TOKEN }}