chore(deps): Update actions/checkout action to v5 (#272)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ci-dgo-tests.yml

@@ -21,13 +21,13 @@ jobs:
     runs-on: warp-ubuntu-latest-x64-4x
     steps:
       - name: Checkout Dgraph repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           path: dgraph
           repository: hypermodeinc/dgraph
           ref: main
       - name: Checkout Dgo repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           path: dgo
           repository: hypermodeinc/dgo