LibEDID: Rename the downloaded PNP IDs file

After fixing the CMake file to use the correct paths, users may have had
to manually remove the existing downloaded pnp.ids.html for CMake to re-
run the generator. So this change renames the downloaded file to
pnp_ids.html to ensure everyone picks up that change without manual
intervention.

Meta/CMake/pnp_ids.cmake

@@ -2,7 +2,7 @@ include(${CMAKE_CURRENT_LIST_DIR}/utils.cmake)
 
 set(PNP_IDS_FILE pnp.ids)
 set(PNP_IDS_URL http://www.uefi.org/uefi-pnp-export)
-set(PNP_IDS_EXPORT_PATH ${CMAKE_BINARY_DIR}/pnp.ids.html)
+set(PNP_IDS_EXPORT_PATH ${CMAKE_BINARY_DIR}/pnp_ids.html)
 set(PNP_IDS_INSTALL_PATH ${CMAKE_INSTALL_DATAROOTDIR}/${PNP_IDS_FILE})
 
 if(ENABLE_PNP_IDS_DOWNLOAD AND NOT EXISTS ${PNP_IDS_EXPORT_PATH})