Update dependency AngleSharp to 1.7.3

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
AngleSharp (source)	1.7.2 → 1.7.3

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Release Notes

AngleSharp/AngleSharp (AngleSharp)

v1.7.3

Released on Thursday, September 3 2026

• Improved tracking of parse exceptions in the HtmlParser (#​1315) @​lahma
• Fixed tokenizer buffer overrun on encoding change (#​1290) @​jafin
• Fixed selector text dropping the nth-child of clause (#​1292) @​jafin
• Fixed selector text dropping the case-insensitive (#​1291) @​jafin
• Fixed selector specificity carrying between fields instead of saturating (#​1300) @​meziantou
• Fixed condition check for disposed state in ReturnToPool (#​1296) @​meziantou
• Fixed ArgumentOutOfRangeException CSS escapes (#​1299) @​meziantou
• Fixed whitespace around An+B CSS selector notations (#​1297)
• Fixed unsupported pseudo-classes matching everything (#​1295)
• Fixed DomException for invalid foreign attribute names such as xml:lang[ (#​1294)
• Fixed script data escaped state leaving escaped mode too early (#​1298)
• Fixed CurrentScript not indicating the currently executing script (#​1308) @​lahma
• Fixed returned missing attribute-properties to use empty string instead of null (#​1313) @​lahma
• Fixed removal of data-* attributes (#​1310) @​lahma
• Added missing DomName/DomAccessor annotations (#​1301) @​meziantou
• Added missing DomLiterals attribute to AdjacentPosition (#​1311) @​lahma

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 69.82%. Comparing base (f10734f) to head (3f31d30).

Additional details and impacted files

@@           Coverage Diff           @@
##              dev      #65   +/-   ##
=======================================
  Coverage   69.82%   69.82%           
=======================================
  Files         104      104           
  Lines        5252     5252           
  Branches      793      793           
=======================================
  Hits         3667     3667           
+ Misses       1243     1242    -1     
- Partials      342      343    +1     

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