Bump actions/checkout from 3 to 4 (#1)

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

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

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

.github/workflows/dnscontrol.yml

@@ -11,7 +11,7 @@ jobs:
   check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: gacts/install-dnscontrol@v1
       - name: DNSControl check
         run: dnscontrol check
@@ -23,7 +23,7 @@ jobs:
         # provider: [cloudflare, digitalocean, transip]
         provider: [cloudflare, transip]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: gacts/install-dnscontrol@v1
       - name: DNSControl check-creds
         run: dnscontrol check-creds ${{ matrix.provider }}
@@ -36,7 +36,7 @@ jobs:
     needs: [check, check-creds]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: gacts/install-dnscontrol@v1
       - name: DNSControl preview
         run: dnscontrol preview
@@ -54,7 +54,7 @@ jobs:
       group: dns-push
       cancel-in-progress: true
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: gacts/install-dnscontrol@v1
       - name: DNSControl push
         run: dnscontrol push