Fix Set Local Variable not supported in RenameVariables

[bhirsz]

Fixes #593

[codecov-commenter]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (83cd472) 96.90% compared to head (c1d5479) 96.91%.

Files	Patch %	Lines
robotidy/transformers/RenameVariables.py	88.88%	3 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #611   +/-   ##
=======================================
  Coverage   96.90%   96.91%           
=======================================
  Files          50       50           
  Lines        4941     4955   +14     
=======================================
+ Hits         4788     4802   +14     
  Misses        153      153           

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