Follow up, Fix Integer Overflow

[mpass99]

The new minor update of Golangcilint, from v1.60.2 to v1.60.3 enabled the identification of another theoretical Integer Overflow Vulnerability.

Related to #664

[codecov]

Codecov Report

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

Project coverage is 76.20%. Comparing base (d448dd8) to head (191f657).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/runner/nomad_runner.go	33.33%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #666      +/-   ##
==========================================
- Coverage   76.24%   76.20%   -0.05%     
==========================================
  Files          43       43              
  Lines        3549     3551       +2     
==========================================
  Hits         2706     2706              
- Misses        619      620       +1     
- Partials      224      225       +1     

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