give up on caching android; tweak qt dir

.github/workflows/build.yml

@@ -56,16 +56,6 @@ jobs:
         with:
           python-version: '3.10'
 
-      - name: actions/cache android
-        if: matrix.platform == 'android'
-        uses: actions/cache@master
-        id: cache
-        with:
-          path: |
-            ${{ env.ANDROID_HOME }}/ndk/21.4.7075529
-            ${{ env.ANDROID_HOME }}/platforms/android-24
-          key: android-24-21.4.7075529
-
       - name: Add msbuild to PATH
         if: matrix.platform == 'msvc2019'
         uses: microsoft/setup-msbuild@main
@@ -97,7 +87,7 @@ jobs:
       - name: Add tools to PATH (MinGW)
         if: matrix.platform == 'mingw81_32'
         shell: bash
-        run: echo "$RUNNER_WORKSPACE/Qt/Tools/mingw810_32/bin" >> $GITHUB_PATH
+        run: echo "${Qt5_DIR}/../../Tools/mingw810_32/bin" >> $GITHUB_PATH
 
       - name: Configure MSVC (Windows)
         if: contains(matrix.platform, 'msvc')
@@ -262,9 +252,9 @@ jobs:
         working-directory: ${{github.workspace}}/bin/
         shell: bash
         run: |
-          cp $RUNNER_WORKSPACE/Qt/Tools/mingw810_32/bin/libgcc_s_dw2-1.dll .
-          cp $RUNNER_WORKSPACE/Qt/Tools/mingw810_32/bin/libstdc++-6.dll .
-          cp $RUNNER_WORKSPACE/Qt/Tools/mingw810_32/bin/libwinpthread-1.dll .
+          cp ${Qt5_DIR}/../../Tools/mingw810_32/bin/libgcc_s_dw2-1.dll .
+          cp ${Qt5_DIR}/../../Tools/mingw810_32/bin/libstdc++-6.dll .
+          cp ${Qt5_DIR}/../../Tools/mingw810_32/bin/libwinpthread-1.dll .
 
       - name: Deploy Linux
         if: matrix.platform == 'gcc_64'