ci: Change pnpm to npm in dependabot configuration

[MoritzWeber0]

Even though we use pnpm, the value has to be npm as per docs

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.48%. Comparing base (fbf5e82) to head (7bd8ea4).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2176   +/-   ##
=======================================
  Coverage   87.48%   87.48%           
=======================================
  Files         239      239           
  Lines        8208     8208           
  Branches      572      572           
=======================================
  Hits         7181     7181           
  Misses        865      865           
  Partials      162      162           

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[github-actions]

This report was generated by comparing 0389956 with fbf5e82.
If you would like to check difference, please check here.

ArtifactName: reg

✨✨ That's perfect, there is no visual difference! ✨✨

item	count
pass	464
change	0
new	0
delete	0