chore(CI): switch back to Qt 6.9.3 and add cache for install-qt-action

.github/workflows/macos.yml

@@ -12,8 +12,9 @@ jobs:
     - name: Install Qt
       uses: jurplel/install-qt-action@v4
       with:
-        version: '6.10.0'
+        version: '6.9.3'
         modules: 'qtimageformats'
+        cache: true
     - name: Install Conan and Dependencies
       id: conan
       working-directory: ./

.github/workflows/windows.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         include:
-          - qt_ver: '6.10.0'
+          - qt_ver: '6.9.3'
             vs: '2022'
             aqt_arch: 'win64_msvc2022_64'
             msvc_arch: 'x64'
@@ -23,6 +23,7 @@ jobs:
         arch: ${{ matrix.aqt_arch }}
         version: ${{ matrix.qt_ver }}
         modules: 'qtimageformats'
+        cache: true
     - name: Build
       shell: cmd
       run: |
@@ -44,7 +45,7 @@ jobs:
     strategy:
       matrix:
         include:
-          - qt_ver: '6.10.0'
+          - qt_ver: '6.9.3'
             vs: '2022'
             aqt_arch: 'win64_msvc2022_64'
             msvc_arch: 'x64'
@@ -59,6 +60,7 @@ jobs:
         arch: ${{ matrix.aqt_arch }}
         version: ${{ matrix.qt_ver }}
         modules: 'qtimageformats'
+        cache: true
     - name: Build
       shell: cmd
       run: |