chore(deps): update actions/checkout action to v6.0.3 (#171)

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

Author: renovate[bot]

.github/workflows/build.yaml

@@ -31,7 +31,7 @@ jobs:
             cnpg_version: 14.18-22
     steps:
       - name: Checkout
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       - name: Get CloudNativePG version
         id: cnpg
         env: