chore(deps): update actions/checkout action to v4

.github/workflows/UnitTests.yml

@@ -8,7 +8,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - uses: actions/setup-dotnet@v1
         with:

.github/workflows/analysis-sonarqube.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2.7.0
+        uses: actions/checkout@v4.1.1
       - name: SonarScanner for .NET Core with pull request decoration support
         uses: highbyte/[email protected]
         with:

.github/workflows/cicd-build-and-publish-docker-image.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Get tag
       id: tag
       uses: dawidd6/action-get-tag@v1