Bump actions/checkout from 6.0.3 to 7.0.0 in the github-actions group (#94)

Bumps the github-actions group with 1 update: [actions/checkout](https://github.com/actions/checkout).


Updates `actions/checkout` from 6.0.3 to 7.0.0
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v6.0.3...v7.0.0)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 7.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/push.yml

@@ -43,7 +43,7 @@ jobs:
     runs-on: self-hosted-generic
     steps:
       - name: Checkout
-        uses: actions/checkout@v6.0.3
+        uses: actions/checkout@v7.0.0
 
       - name: Build and Push Greenbone Registry
         id: build

.github/workflows/release.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: self-hosted-generic
     steps:
       - name: Checkout
-        uses: actions/checkout@v6.0.3
+        uses: actions/checkout@v7.0.0
 
       - name: Get dockerhub postgres service tags
         id: dtags