update workflow to v4

.github/workflows/main.yaml

@@ -5,7 +5,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     # Use current kicad repo commit that triggered this build.
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         submodules: recursive
 
@@ -32,13 +32,13 @@ jobs:
 
     # Update artifacts
     - name: Upload Results
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: ${{ env.PROJECT_NAME }}-datapack
         path: output
 
     # - name: Upload Kibot Log File
-    #   uses: actions/upload-artifact@v3
+    #   uses: actions/upload-artifact@v4
     #   if: always()
     #   with:
     #     name: logs