fix: pretter Line progress style (#1310)

[sendya]

This is a ...

• New feature
• Bug fix
• Site / document update
• Component style update
• TypeScript definition update
• Refactoring
• Code style optimization
• Branch merge
• Other (about what?)

What's the background?

#1310

API Realization (Optional if not new feature)

1. Basic thought of solution and other optional proposal.
2. List final API realization and usage sample.
3. GIF or snapshot should be provided if includes UI/interactive modification.

What's the effect? (Optional if not new feature)

1. Does this PR affect user? Which part will be affected?
2. What will say in changelog?
3. Does this PR contains potential break change or other risk?

Changelog description (Optional if not new feature)

1. English description
   pretter Line progress style (进度条strokeLinecap="square" 有问题。进度条边缘的形状， 底部右侧有弧度,没有调整过来，percent<100 #1310)
2. Chinese description (optional)
   修正进度条方角边缘为显示问题 (进度条strokeLinecap="square" 有问题。进度条边缘的形状， 底部右侧有弧度,没有调整过来，percent<100 #1310)

Self Check before Merge

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• TypeScript definition is updated/provided or not needed
• Changelog is provided or not needed

Additional Plan? (Optional if not new feature)

If this PR related with other PR or following info. You can type here.

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[codecov]

Codecov Report

Merging #1311 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1311   +/-   ##
=======================================
  Coverage   87.51%   87.51%           
=======================================
  Files         156      156           
  Lines        5406     5406           
  Branches     1523     1523           
=======================================
  Hits         4731     4731           
  Misses        599      599           
  Partials       76       76

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[github-actions]

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