CI: use checkout v4

Author: glpatcern

.github/workflows/ci-tests.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v3.1.0
+      uses: actions/checkout@v4
 
     - name: Set up Python 3.11
       uses: actions/setup-python@v2

.github/workflows/codeql.yml

@@ -24,7 +24,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v3.1.0
+        uses: actions/checkout@v4
 
       - name: Initialize CodeQL
         uses: github/codeql-action/init@v3

.github/workflows/release.yml

@@ -30,7 +30,7 @@ jobs:
           push: ${{ github.event_name != 'workflow_dispatch' }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v3.1.0
+        uses: actions/checkout@v4
       - name: Set up QEMU
         if: matrix.platform != ''
         uses: docker/setup-qemu-action@v2