update navi to 2.13.1

Summary:
Update navi to latest upstream release.

Changelog can be found here

Test Plan:

• Downloaad/manage multiple cheatsheet repos
• Use cheatsheets for git and eopkg
• Run commands via cheatsheets (git init, git add, eopkg up, etc)

Reviewers: Triage Team, JoshStrobl

Reviewed By: Triage Team, JoshStrobl

Subscribers: JoshStrobl, sethfl

Differential Revision: https://dev.getsol.us/D10236