Set NSIS package name to "LOVE".

Otherwise, the start menu folder created by the installer is called "LÖVE",
which is a change from how it worked before.

CMakeLists.txt

@@ -1230,7 +1230,7 @@ set(CPACK_RESOURCE_FILE_README "${CMAKE_CURRENT_SOURCE_DIR}/readme.md")
 set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_CURRENT_SOURCE_DIR}/license.txt")
 
 set(CPACK_NSIS_EXECUTABLES_DIRECTORY .)
-set(CPACK_NSIS_PACKAGE_NAME "LÖVE")
+set(CPACK_NSIS_PACKAGE_NAME "LOVE")
 set(CPACK_NSIS_DISPLAY_NAME "LÖVE ${LOVE_VERSION_STR}")
 set(CPACK_NSIS_MODIFY_PATH OFF)