Pcbnew: export footprints in normal mode, not compact

Otherwise, footprints will export differently to how they save.

In master, this is already fixed with
KICAD_FORMAT::Prettify( prettyData, KICAD_FORMAT::FORMAT_MODE::NORMAL );

Fixes: https://gitlab.com/kicad/code/kicad/-/issues/23050

pcbnew/footprint_libraries_utils.cpp

@@ -272,7 +272,7 @@ void FOOTPRINT_EDIT_FRAME::ExportFootprint( FOOTPRINT* aFootprint )
         }
 
         std::string prettyData = pcb_io.GetStringOutput( false );
-        KICAD_FORMAT::Prettify( prettyData, true );
+        KICAD_FORMAT::Prettify( prettyData, false );
 
         fprintf( fp, "%s", prettyData.c_str() );
         fclose( fp );