check-remote-image-existence.yml: use actions/checkout@v4

Signed-off-by: Norio Nomura <[email protected]>

Author: norio-nomura

.github/workflows/check-remote-image-existence.yml

@@ -14,7 +14,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
     - name: Run check-remote-image-existence.sh
       run: ./hack/check-remote-image-existence.sh