chore(deps): bump actions/checkout from 2 to 2.3.4

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 2.3.4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2...v2.3.4)

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

.github/workflows/build.yml

@@ -34,7 +34,7 @@ jobs:
         java: [8,11]
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
       - name: Setup Java
         uses: actions/setup-java@v2
         with:

.github/workflows/e2e-tests.yml

@@ -35,7 +35,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
       - name: Cache .m2 registry
         uses: actions/[email protected]
         with:
@@ -55,7 +55,7 @@ jobs:
         kubernetes: [v1.20.1,v1.19.2,v1.12.0]
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
       - name: Setup Minikube-Kubernetes
         uses: manusa/[email protected]
         with:
@@ -87,7 +87,7 @@ jobs:
         openshift: [v3.11.0,v3.10.0]
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
       - name: Setup OpenShift
         uses: manusa/[email protected]
         with:

.github/workflows/gobuild.yml

@@ -28,7 +28,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
       - name: Build Project
         run: |
           ./kubernetes-model-generator/generateModelDocker.sh

.github/workflows/javadocs.yml

@@ -31,7 +31,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
       - name: Setup Java 8
         uses: actions/setup-java@v2
         with:

.github/workflows/license.yml

@@ -31,7 +31,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
       - name: Setup Java 8
         uses: actions/setup-java@v2
         with:

.github/workflows/sonar.yml

@@ -34,7 +34,7 @@ jobs:
       SONAR_LOGIN_TOKEN: ${{ secrets.SONAR_LOGIN_TOKEN }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
         with:
           # Shallow clones should be disabled for a better relevancy of analysis
           fetch-depth: 0