fix: DEV-1462: Fix changing label config for repeater tag

[KonstantinKorotaev]

[swarmia[bot]]

✅  Linked to Bug DEV-1462 · Can't change config with repeater after creating of annotations
➡️  Part of Epic DEV-2622 · Annotation issues - no epic

[codecov[bot]]

Codecov Report

Merging #2725 (b98011f) into develop (cf9af16) will increase coverage by 0.06%. The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #2725      +/-   ##
===========================================
+ Coverage    77.02%   77.08%   +0.06%     
===========================================
  Files          144      144              
  Lines        10471    10522      +51     
===========================================
+ Hits          8065     8111      +46     
- Misses        2406     2411       +5     

Impacted Files	Coverage Δ
label_studio/label_studio/projects/models.py	83.13% <0.00%> (+0.02%)	:arrow_up:
label_studio/label_studio/core/label_config.py	74.66% <0.00%> (+3.11%)	:arrow_up:

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