DataGrid: Fix FilterDefinition.Title not updating when selected field is changed

[Saman-00]

Description

Title Property of FilterDefinition doesn't get updated when the user changes the filter field in DataGrid when FilterMode is DataGridFilterMode.Simple.

How Has This Been Tested?

Manually.

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 not work as expected)

Checklist:

• The PR is submitted to the correct branch (dev).
• My code follows the code style of this project.
• I've added relevant tests.

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (df6d943) 87.19% compared to head (d1f7d0f) 87.18%.

Files	Patch %	Lines
src/MudBlazor/Components/DataGrid/Filter.cs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #7821      +/-   ##
==========================================
- Coverage   87.19%   87.18%   -0.01%     
==========================================
  Files         389      389              
  Lines       11421    11422       +1     
  Branches     2299     2299              
==========================================
  Hits         9958     9958              
- Misses        966      967       +1     
  Partials      497      497              

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[tjscience]

Looks good to me. Thanks, @Saman-00