Update revxlp

- Remove fork from outboard as now builds from ZMK main

.github/workflows/outboards/shields/revxlp

@@ -1,8 +1,8 @@
-# Copyright 2022 Manna Harbour
+# Copyright 2023 Manna Harbour
 # https://github.com/manna-harbour/miryoku
 
 outboard_repository=petejohanson/revxlp-config
 outboard_ref=main
 outboard_from=config/boards/shields/revxlp
 outboard_to=boards/shields/revxlp
-zmk=petejohanson/zmk/drivers/gpio-595-shift-register
+