Update actions/checkout action to v7

Signed-off-by: red-hat-konflux <126015336+red-hat-konflux[bot]@users.noreply.github.com>

Author: red-hat-konflux[bot]

.github/workflows/gating.yaml

@@ -16,7 +16,7 @@ jobs:
       image: quay.io/exd-guild-compose/cts:latest
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - name: Install system dependencies
         run: >
           sudo dnf update -y &&