upgrade checkout action

Author: ddennedy

.github/workflows/build-linux-unstable.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           ref: qt6
 

.github/workflows/build-linux.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Build
         run: |

.github/workflows/build-sdk-windows-unstable.yml

@@ -49,7 +49,7 @@ jobs:
             mingw-w64-x86_64-libimagequant
             mingw-w64-x86_64-python3.11
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           ref: qt6
 

.github/workflows/build-sdk-windows.yml

@@ -50,7 +50,7 @@ jobs:
             mingw-w64-x86_64-libimagequant
             mingw-w64-x86_64-python3.11
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Build
         shell: msys2 {0}

.github/workflows/build-windows-unstable.yml

@@ -55,7 +55,7 @@ jobs:
             mingw-w64-x86_64-libimagequant
             mingw-w64-x86_64-python3.11
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           ref: qt6
 

.github/workflows/build-windows.yml

@@ -55,7 +55,7 @@ jobs:
             mingw-w64-x86_64-python3.11
             mingw-w64-x86_64-zimg
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Build
         shell: msys2 {0}

.github/workflows/check-code-format.yml

@@ -12,7 +12,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install Artistic Style
         run: sudo apt-get install -y astyle grep