change neovim to proper icon

[zachcoyle]

Change neovim icon from vim icon to neovim icon

TODO

• [ x] Use cargo fmt
• Add necessary tests (n/a)
• Update default config/theme in README (if applicable) (n/a)
• Update man page at lsd/doc/lsd.md (if applicable) (n/a)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (41893ae) 84.63% compared to head (ec982e9) 84.63%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #993   +/-   ##
=======================================
  Coverage   84.63%   84.63%           
=======================================
  Files          53       53           
  Lines        5078     5078           
=======================================
  Hits         4298     4298           
  Misses        780      780           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[muniu-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: zachcoyle

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment