fix: Change language to default when no value is provided in Preferences in Localization section

[mayank6725]

Fixes #31307

What was done to fix this?

Just added the default value to be '' for value field in PreferencesLocalizationSection.tsx when no language is provided.
'' is the default key value for language Default

Before

After

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Latest commit: 1022fc1

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (caa7707) 49.33% compared to head (1022fc1) 76.39%.

Additional details and impacted files

@@             Coverage Diff              @@
##           develop   #31311       +/-   ##
============================================
+ Coverage    49.33%   76.39%   +27.06%     
============================================
  Files         3299      281     -3018     
  Lines        81122     8972    -72150     
  Branches     16594     1697    -14897     
============================================
- Hits         40020     6854    -33166     
+ Misses       36454     1693    -34761     
+ Partials      4648      425     -4223     

Flag	Coverage Δ
e2e	?
e2e-api	?
unit	76.39% <ø> (ø)

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[dougfabris]

Hi there, thanks for the contribution! 🚀 💯

Closing this PR because it's duplicated now and it has been fixed in another one. #31312

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