Update all GH checkout steps

.github/workflows/ci_gd3.yml

@@ -43,7 +43,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Update apt
         if: contains(matrix.os, 'ubuntu')

.github/workflows/ci_macos.yml

@@ -37,7 +37,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Install dependencies
         run: |

.github/workflows/ci_ubuntu.yml

@@ -45,7 +45,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Update apt (Ubuntu)
         env:

.github/workflows/ci_windows.yml

@@ -26,7 +26,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - uses: ilammy/msvc-dev-cmd@v1
         with:
           arch: ${{ matrix.arch }}

.github/workflows/ci_windows_mingw.yml

@@ -36,7 +36,7 @@ jobs:
       shell: bash
 
     - name: '🧰 Checkout'
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
       with:
         fetch-depth: 0
 

.github/workflows/coverity.yml

@@ -36,7 +36,7 @@ jobs:
                libwebp-dev
                libx265-dev
                libxpm-dev
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Configure gd
       run: cmake
                -DENABLE_CPP=1

.github/workflows/shellcheck.yml

@@ -14,7 +14,7 @@ jobs:
     name: Shellcheck
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Run ShellCheck
       uses: ludeeus/action-shellcheck@master
       env: