fix: use version if defined when creating new concept

[jeffreiffers]

No description provided.

[codecov]

Codecov Report

Merging #299 (d90408d) into main (d2913dd) will increase coverage by 0.65%.
The diff coverage is 86.66%.

@@             Coverage Diff              @@
##               main     #299      +/-   ##
============================================
+ Coverage     83.25%   83.90%   +0.65%     
- Complexity      454      463       +9     
============================================
  Files            52       51       -1     
  Lines          1606     1628      +22     
  Branches        247      254       +7     
============================================
+ Hits           1337     1366      +29     
+ Misses          131      122       -9     
- Partials        138      140       +2     

Files	Coverage Δ
...main/kotlin/no/fdk/concept_catalog/model/Begrep.kt	97.50% <100.00%> (+0.03%)	⬆️
...n/no/fdk/concept_catalog/service/ConceptMappers.kt	97.70% <100.00%> (+0.01%)	⬆️
...n/no/fdk/concept_catalog/service/ConceptService.kt	82.43% <85.18%> (+4.41%)	⬆️

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