bump rust 1.84.1

[zjb0807]

paritytech/srtool#94

nutsfinance/stable-asset#57

[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 2 lines in your changes missing coverage. Please review.

Project coverage is 61.35%. Comparing base (7de9ac9) to head (60ab8f7).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
primitives/src/signature.rs	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2870      +/-   ##
==========================================
- Coverage   61.40%   61.35%   -0.06%     
==========================================
  Files          69       69              
  Lines        9403     9401       -2     
==========================================
- Hits         5774     5768       -6     
- Misses       3629     3633       +4     

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