ci: drop modules:'qtquickcontrols2' (rolled into base Qt 6)

aqt's "modules" list is for *additional* modules beyond the base Qt
install (qt5compat, qtcharts, qtmultimedia, qtwebsockets, etc.).
QtQuick.Controls 2 was a separately-shipped Qt 5 module, but in Qt
6.0+ it was folded into qtdeclarative — part of every base install.

aqt 3.3 rejects the obsolete name with:
  ERROR: The packages ['qtquickcontrols2'] were not found while
         parsing XML of package information!

Project's CMakeLists request `Core Gui Quick QuickControls2 Network
Qml` — all in base Qt 6.5. No `modules:` line needed.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitea/workflows/ci.yml

@@ -54,7 +54,6 @@ jobs:
         uses: jurplel/install-qt-action@v4
         with:
           version: '6.5.*'
-          modules: 'qtquickcontrols2'
           dir: ${{ github.workspace }}/qt
           cache: true
           setup-python: false

.gitea/workflows/release.yml

@@ -37,7 +37,6 @@ jobs:
         uses: jurplel/install-qt-action@v4
         with:
           version: '6.5.*'
-          modules: 'qtquickcontrols2'
           dir: ${{ github.workspace }}/qt
           cache: true
           setup-python: false