Add hint for why camera access is needed on iOS

Author: ann0see

.github/autobuild/ios.sh

@@ -56,6 +56,8 @@ setup() {
         pip install "aqtinstall==${AQTINSTALL_VERSION}"
         # Install actual ios Qt:
         local qtmultimedia=()
+        # qtmultimedia requests camera and microphone permissions: https://doc.qt.io/qt-6.5/qtmultimedia-apple.html We do not need camera permissions, but
+        # AppStore Connect needs a description even if we never request for it. See the Info.plist file in the iOS build.
         if [[ ! "${QT_VERSION}" =~ 5\.[0-9]+\.[0-9]+ ]]; then
             # From Qt6 onwards, qtmultimedia is a module and cannot be installed
             # as an archive anymore.