Use aqtinstall HEAD for Qt 6.8.1 and 6.8.0 support

At least until the fix for #843 is released (presumably in
aqtinstall 3.1.22).

See miurahr/aqtinstall#843 and
miurahr/aqtinstall#857.

Author: pcolby

.github/workflows/build.yaml

@@ -60,6 +60,11 @@ jobs:
             ${{ (startsWith(matrix.qt, '5.10.') || startsWith(matrix.qt, '5.11.')) && 'qt' ||
                 (startsWith(matrix.qt, '5') && 'qtcore qtbluetooth' || 'qtcore') }}
           doc-modules: ${{ startsWith(matrix.qt, '6') && 'qtbluetooth' || '' }}
+          # \todo Use aqtinstall HEAD for Qt 6.8.1 and 6.8.0 support, until the fix for #843 is released (presumably in
+          # aqtinstall 3.1.22. See https://github.com/miurahr/aqtinstall/issues/843
+          aqtsource: >-
+            ${{ (startsWith(matrix.qt, '6.8') || startsWith(matrix.qt, '6.9')) &&
+                 'git+https://github.com/miurahr/aqtinstall.git' || '' }}
       - name: Upload aqtinstall log file
         if: failure()
         uses: actions/upload-artifact@v4
@@ -215,6 +220,11 @@ jobs:
             ${{ (startsWith(matrix.qt, '5.10.') || startsWith(matrix.qt, '5.11.')) && 'qt' ||
                 (startsWith(matrix.qt, '5') && 'qtcore qtbluetooth' || 'qtcore') }}
           doc-modules: ${{ startsWith(matrix.qt, '6') && 'qtbluetooth' || '' }}
+          # \todo Use aqtinstall HEAD for Qt 6.8.1 and 6.8.0 support, until the fix for #843 is released (presumably in
+          # aqtinstall 3.1.22. See https://github.com/miurahr/aqtinstall/issues/843
+          aqtsource: >-
+            ${{ (startsWith(matrix.qt, '6.8') || startsWith(matrix.qt, '6.9')) &&
+                 'git+https://github.com/miurahr/aqtinstall.git' || '' }}
       - name: Upload aqtinstall log file
         if: failure()
         uses: actions/upload-artifact@v4
@@ -503,6 +513,11 @@ jobs:
           version: ${{ matrix.qt }}
           arch: win64_msvc2019_64
           set-env: false
+          # \todo Use aqtinstall HEAD for Qt 6.8.1 and 6.8.0 support, until the fix for #843 is released (presumably in
+          # aqtinstall 3.1.22. See https://github.com/miurahr/aqtinstall/issues/843
+          aqtsource: >-
+            ${{ (startsWith(matrix.qt, '6.8') || startsWith(matrix.qt, '6.9')) &&
+                 'git+https://github.com/miurahr/aqtinstall.git' || '' }}
       - name: Upload aqtinstall log file
         if: matrix.arch == 'arm64' && failure()
         uses: actions/upload-artifact@v4
@@ -523,6 +538,11 @@ jobs:
              ${{ (startsWith(matrix.qt, '5.10.') || startsWith(matrix.qt, '5.11.')) && 'qt' ||
                  (startsWith(matrix.qt, '5') && 'qtcore qtbluetooth' || 'qtcore') }}
           doc-modules: ${{ startsWith(matrix.qt, '6') && 'qtbluetooth' || '' }}
+          # \todo Use aqtinstall HEAD for Qt 6.8.1 and 6.8.0 support, until the fix for #843 is released (presumably in
+          # aqtinstall 3.1.22. See https://github.com/miurahr/aqtinstall/issues/843
+          aqtsource: >-
+            ${{ (startsWith(matrix.qt, '6.8') || startsWith(matrix.qt, '6.9')) &&
+                 'git+https://github.com/miurahr/aqtinstall.git' || '' }}
       - name: Upload aqtinstall log file
         if: failure()
         uses: actions/upload-artifact@v4