chore(deps): update actions/checkout action to v4

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

.github/workflows/nginx_hardening.yml

@@ -51,7 +51,7 @@ jobs:
           # - fedora  # no support from geerlingguy role
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: ansible_collections/devsec/hardening
           submodules: true