Propagate wxEVT_COMMAND_TEXT_UPDATED renaming to the real stc.cpp.

wxEVT_COMMAND_TEXT_UPDATED was renamed to wxEVT_TEXT in the generated stc.cpp
but not in stc.cpp.in it was generated from. Do it there too to prevent the
correct version in stc.cpp from being overwritten during the next regeneration.

See #10661.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74032 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775