dhcp: fix scope moving when it shouldn't

[BeryJu]

closes #1269

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[codecov]

Bundle Report

Bundle size has no change ✅

[codecov]

Codecov Report

Attention: Patch coverage is 37.50000% with 5 lines in your changes missing coverage. Please review.

Project coverage is 61.18%. Comparing base (0a66b6d) to head (2e8fd6c).
Report is 1 commits behind head on main.

❌ We are unable to process any of the uploaded JUnit XML files. Please ensure your files are in the right format.

Files with missing lines	Patch %	Lines
pkg/roles/dhcp/scopes.go	37.50%	4 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1318      +/-   ##
==========================================
+ Coverage   61.15%   61.18%   +0.02%     
==========================================
  Files         108      108              
  Lines        6125     6132       +7     
==========================================
+ Hits         3746     3752       +6     
- Misses       2030     2031       +1     
  Partials      349      349              

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