Update build-visual_studio-qt6.yml

Set to workflow_call so we can make a release

Author: neatchee

.github/workflows/build-visual_studio-qt6.yml

@@ -1,11 +1,7 @@
 name: Build Chiaki (VC Qt6)
 
 on:
-  workflow_dispatch:
-  # workflow_call: #testing!
-
-  # TODO: https://www.qt.io/blog/qt-multimedia-in-qt-6
-  # Not as easy as updating a cmakelists.txt file :(
+  workflow_call:
 
 jobs:
   build-win_x64: # only win_x64 so far :)