Fix: set correct error variable when put distributions

[okomio]

Description

Hi everyone involved!
I noticed that if an error occurs on the DB side during the put distributions operation, a non-user-friendly message appeared in the popup dialog (see below). A quick analysis of the code revealed that the wrong error variable is passed to the response.

Motivation and Context

If something goes wrong when updating distribution, a user-friendly error message should be displayed.

How Has This Been Tested?

It's a super clear, one-line fix that does not require any special testing or any additional effort.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov-commenter]

Codecov Report

Merging #538 (237af5b) into main (10f5e51) will not change coverage.
The diff coverage is 0.00%.

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@@           Coverage Diff           @@
##             main     #538   +/-   ##
=======================================
  Coverage   80.96%   80.96%           
=======================================
  Files          28       28           
  Lines        2222     2222           
=======================================
  Hits         1799     1799           
  Misses        334      334           
  Partials       89       89           

Impacted Files	Coverage Δ
pkg/handler/crud.go	86.32% <0.00%> (ø)

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