feat(Bootstrap): bump version 5.3.8

[ArgoZhang]

Link issues

fixes #6735

Summary By Copilot

Regression?

• Yes
• No

Risk

• High
• Medium
• Low

Verification

• Manual (required)
• Automated

Packaging changes reviewed?

• Yes
• No
• N/A

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• Merge the latest code from the main branch

[sourcery-ai]

Sorry @ArgoZhang, your pull request is larger than the review limit of 150000 diff characters

[Copilot]

Pull Request Overview

This PR updates Bootstrap from version 5.3.7 to 5.3.8, incorporating the latest bug fixes and improvements from the Bootstrap CSS framework.

• Updated version number in CSS file headers from v5.3.7 to v5.3.8
• Added styling for webkit search cancel button with pointer cursor and grayscale filter
• Added flex-shrink: 0 property to spinner components to prevent unwanted shrinking

Reviewed Changes

Copilot reviewed 2 out of 6 changed files in this pull request and generated no comments.

File	Description
src/BootstrapBlazor/wwwroot/core/bootstrap/css/bootstrap.css	Updated main Bootstrap CSS file with version bump and new CSS rules
src/BootstrapBlazor/wwwroot/core/bootstrap/css/bootstrap.rtl.css	Updated RTL Bootstrap CSS file with version bump and new CSS rules

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (fa7a166) to head (e11bc17).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #6736   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          739       739           
  Lines        31713     31713           
  Branches      4462      4462           
=========================================
  Hits         31713     31713           

Flag	Coverage Δ
BB	100.00% <ø> (?)

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