prompt: update powerlevel10k submodule to the latest commit

- Several bug fixes. Most notable:
  - Don't hide command execution time on reset-prompt.
  - Support prezto with zsh 5.1.
  - Don't hide nvm prompt when there is no nvm command.
- New prompt: ranger.
- Add an option to hide rust version when outside of rust project tree.
- Add an option to show rvm gemset.

modules/prompt/external/powerlevel10k

@@ -1 +1 @@
-Subproject commit 635b0d7c99a22d996b5ca43efb56e9ec6b1ebdb4
+Subproject commit 3090ae6633aedc50b43524e6c2ce1482b0a15772