Bump actions/checkout from 2 to 4 (#109)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2...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/backward-compatibility.yaml

@@ -9,7 +9,7 @@ jobs:
   integration:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Start a kind cluster with containerd
         uses: helm/kind-action@v1.4.0
         with:

.github/workflows/containerd.yaml

@@ -9,7 +9,7 @@ jobs:
   integration:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Start a kind cluster with containerd
         uses: helm/kind-action@v1.4.0
         with:

.github/workflows/cri-o.yaml

@@ -9,7 +9,7 @@ jobs:
   integration:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Start a kind cluster with crio
         uses: helm/kind-action@v1.4.0
         with:

.github/workflows/docker-containerd.yaml

@@ -5,7 +5,7 @@ jobs:
   integration:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: opsgang/ga-setup-minikube@v0.1.2
         with:
           minikube-version: '1.20.0'

.github/workflows/metrics.yaml

@@ -9,7 +9,7 @@ jobs:
   integration:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Start a kind cluster with containerd
         uses: helm/kind-action@v1.4.0
         with:

.github/workflows/restart-ds-containerd.yaml

@@ -9,7 +9,7 @@ jobs:
   integration:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Start a kind cluster with containerd
         uses: helm/kind-action@v1.4.0
         with:

.github/workflows/restart-ds-crio.yaml

@@ -9,7 +9,7 @@ jobs:
   integration:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Start a kind cluster with crio
         uses: helm/kind-action@v1.4.0
         with: