Update actions/checkout to v4 (#3152)

Author: pietern

.github/workflows/codeql-analysis.yml

@@ -21,7 +21,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
     - name: Initialize CodeQL
       uses: github/codeql-action/init@v2

.github/workflows/push.yml

@@ -11,10 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
-
-      - name: Unshallow
-        run: git fetch --prune --unshallow
+        uses: actions/checkout@v4
 
       - name: Set up Go
         uses: actions/setup-go@v1
@@ -52,7 +49,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Setup Go
         uses: actions/setup-go@v3

.github/workflows/release.yml

@@ -11,10 +11,10 @@ jobs:
     steps:
       -
         name: Checkout
-        uses: actions/checkout@v2
-      -
-        name: Unshallow
-        run: git fetch --prune --unshallow
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
       -
         name: Set up Go
         uses: actions/setup-go@v1