Update actions/checkout action to v4

Author: user

.github/workflows/master.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
 
     - name: Set up CI Image Metadata
       id: docker_meta_ci
@@ -48,7 +48,7 @@ jobs:
     needs: build
     steps:
     - name: Checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
 
     - name: Download artifact
       uses: actions/download-artifact@v3
@@ -66,7 +66,7 @@ jobs:
     needs: e2e
     steps:
     - name: Checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
 
     - name:  Set up Docker Hub Image Metadata
       id: docker_meta