Fix link to Rust style guide

[cstyles]

Issues:

N/A

Description of changes:

The style guide moved repos. This PR updates the link.

Call-outs:

N/A

Testing:

N/A

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license and the ISC license.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.58%. Comparing base (c358484) to head (1717f6b).
Report is 78 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #502      +/-   ##
==========================================
- Coverage   95.80%   92.58%   -3.22%     
==========================================
  Files          61       66       +5     
  Lines        8143     8812     +669     
  Branches        0     8812    +8812     
==========================================
+ Hits         7801     8159     +358     
- Misses        342      396      +54     
- Partials        0      257     +257     

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