Bump actions/checkout from 2.4.0 to 3 (vmware-tanzu#222)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2.4.0 to 3.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2.4.0...v3)

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

Signed-off-by: dependabot[bot] <[email protected]>

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

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -14,7 +14,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2.4.0
+    - uses: actions/checkout@v3
     - uses: actions/setup-go@v3
       with:
         go-version: 1.15.x
@@ -34,7 +34,7 @@ jobs:
       KO_DOCKER_REPO: registry.local:5000/service-bindings
       BUNDLE: registry.local:5000/service-bindings/bundle
     steps:
-    - uses: actions/checkout@v2.4.0
+    - uses: actions/checkout@v3
     - uses: actions/setup-go@v3
       with:
         go-version: 1.15.x
@@ -132,7 +132,7 @@ jobs:
       REGISTRY_PORT: 5000
       BUNDLE: registry.local:5000/service-bindings/bundle
     steps:
-    - uses: actions/checkout@v2.4.0
+    - uses: actions/checkout@v3
     - uses: vmware-tanzu/carvel-setup-action@v1
       with:
         imgpkg: v0.22.0
@@ -329,7 +329,7 @@ jobs:
     if: startsWith(github.ref, 'refs/tags/')
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2.4.0
+    - uses: actions/checkout@v3
     - uses: vmware-tanzu/carvel-setup-action@v1
       with:
         imgpkg: v0.22.0