Bump actions/checkout from 2 to 7

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 7.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2...v7)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/build-push.yml

@@ -12,7 +12,7 @@ jobs:
 
     steps:
       - name: Check out
-        uses: actions/checkout@v2
+        uses: actions/checkout@v7
 
       - name: login to registry
         uses: docker/login-action@v4

.github/workflows/build-verify-on-PR.yml

@@ -12,7 +12,7 @@ jobs:
       catalog_changed: ${{ steps.filter.outputs.catalog }}
     steps:
       - name: Check out
-        uses: actions/checkout@v2
+        uses: actions/checkout@v7
 
       - name: Check for catalog changes
         uses: dorny/paths-filter@v3
@@ -29,7 +29,7 @@ jobs:
 
     steps:
       - name: Check out
-        uses: actions/checkout@v2
+        uses: actions/checkout@v7
 
       # models a future action where the submittor is validated against auth access for the
       # catalog contribution