update workflow, speed up ci

.github/workflows/ubuntu.yml

@@ -24,11 +24,17 @@ jobs:
     env:
       targetName: example
     steps:
+      - name: '⚙️ Cache Qt'
+        id: cache-qt
+        uses: actions/cache@v3
+        with:
+          path: ${{ runner.workspace }}/Qt
+          key: ${{runner.os}}-qtcachedir-${{ matrix.qt_ver }}
       - name: Install Qt
         uses: jurplel/install-qt-action@v3
         with:
           version: ${{ matrix.qt_ver }}
-          cached: 'false'
+          cache: ${{steps.cache-qt.outputs.cache-hit}}
           arch: ${{ matrix.qt_arch }}
           modules: 'qt5compat qtmultimedia qtshadertools qtimageformats'
       - name: ubuntu install GL library
@@ -44,6 +50,8 @@ jobs:
         uses: miurahr/install-linuxdeploy-action@v1
         with:
           plugins: qt appimage
+      - name: Check if svg file exists
+        run: if [ ! -f "${targetName}.svg" ]; then echo "File not found, creating..."; touch ${targetName}.svg; fi
       # 打包
       - name: package
         run: |