ci: upgrade GitHub Actions to Node 24–compatible versions

.github/workflows/build-desktop.yml

@@ -20,12 +20,12 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     - name: Setup Node.js
-      uses: actions/setup-node@v4
+      uses: actions/setup-node@v6
       with:
-        node-version: '22'
+        node-version: '24'
         cache: 'npm'
 
     - name: Install dependencies
@@ -603,7 +603,7 @@ jobs:
 
     - name: Upload artifacts (Windows)
       if: matrix.os == 'windows-latest' && success()
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v7
       with:
         name: windows-app
         path: |
@@ -613,15 +613,15 @@ jobs:
 
     - name: Upload artifacts (macOS)
       if: matrix.os == 'macos-latest' && success()
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v7
       with:
         name: macos-app
         path: release/*.dmg
         if-no-files-found: ignore
 
     - name: Upload artifacts (Linux)
       if: matrix.os == 'ubuntu-latest' && success()
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v7
       with:
         name: linux-app
         path: release/*.AppImage
@@ -636,7 +636,7 @@ jobs:
 
     steps:
     - name: Download all artifacts
-      uses: actions/download-artifact@v4
+      uses: actions/download-artifact@v8
       continue-on-error: true
 
     - name: List downloaded files