chore: update helm-values-schema to v2.3.1

[ZohebShaikh]

The updated version of helm-values-schema resolves the issue with the required global variable, which is necessary when using the chart as a dependency. However, it introduces a new problem: references to #/defs/{model} (models within ApplicationConfig) are removed.
This appears to be caused by a bug in the RemoveUnusedDefs function. As a workaround, the schema generation has been updated to use $id references instead of defs. This change is safe in our case, as all models within ApplicationConfig are unique(will remain unique).

Closes #1192

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.76%. Comparing base (b28250a) to head (20ccef4).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1320      +/-   ##
==========================================
+ Coverage   94.74%   94.76%   +0.01%     
==========================================
  Files          42       42              
  Lines        2741     2751      +10     
==========================================
+ Hits         2597     2607      +10     
  Misses        144      144              

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[dan-fernandes]

LGTM