[stable8] fix(NcHotkeyList): align with form labels

[backportbot]

Backport of PR #7807

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 44.62%. Comparing base (e35d454) to head (eadb110).
⚠️ Report is 3 commits behind head on stable8.

Files with missing lines	Patch %	Lines
src/components/NcHotkey/NcHotkey.vue	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           stable8    #7810   +/-   ##
========================================
  Coverage    44.62%   44.62%           
========================================
  Files          188      188           
  Lines         4710     4710           
  Branches      1226     1165   -61     
========================================
  Hits          2102     2102           
- Misses        2513     2515    +2     
+ Partials        95       93    -2     

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