Fix Qt Creator plugin wizard's GitHub action

for the changed location of build_plugin.py

Fixes: QTCREATORBUG-25727
Change-Id: I6bda26b1820b86ac4cf12a55821eed879ee818bc
Reviewed-by: Cristian Adam <cristian.adam@qt.io>

share/qtcreator/templates/wizards/qtcreatorplugin/github_workflows_build_cmake.yml

@@ -212,10 +212,18 @@ jobs:
 
         set(ENV{NINJA_STATUS} "[%f/%t %o/sec] ")
 
+        set(build_plugin_py "scripts/build_plugin.py")
+        foreach(dir "share/qtcreator/scripts" "Qt Creator.app/Contents/Resources/scripts" "Contents/Resources/scripts")
+          if(EXISTS "${{ steps.qt_creator.outputs.qtc_dir }}/${dir}/build_plugin.py")
+            set(build_plugin_py "${dir}/build_plugin.py")
+            break()
+          endif()
+        endforeach()
+
         execute_process(
           COMMAND python
             -u
-            ${{ steps.qt_creator.outputs.qtc_dir }}/scripts/build_plugin.py
+            "${{ steps.qt_creator.outputs.qtc_dir }}/${build_plugin_py}"
             --name "$ENV{PLUGIN_NAME}-$ENV{QT_CREATOR_VERSION}-${{ matrix.config.artifact }}"
             --src .
             --build build