Update dependency docfx to v2.81.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
docfx	2.80.1 → 2.81.0

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Release Notes

dotnet/docfx (docfx)

v2.81.0

Compare Source

What's Changed

✨ Features & Platform Support

• Allow custom templates to override search.min.js in the modern template by @​filzrev in #​10055.
• Add metadata.sourceLinkExclude to exclude selected source paths from View Source links without removing API documentation by @​vicancy in #​11141.
• Record the DocFX build version in the docfx_version field of manifest.json by @​vicancy in #​11162.
• Add a .NET 11 RC target, including support for the .NET 11 Razor source generator, while retaining .NET 8, 9, and 10 targets by @​vicancy and @​filzrev in #​11176 and #​11182.

⚡ Performance & Reliability

• Reduce JavaScript template processing overhead and memory allocations by reusing parsed scripts and improving model conversion. Add execution limits to prevent runaway scripts from hanging builds by @​lahma in #​11084.
• Avoid unnecessary exceptions and repeated file reads when loading toc.yml by @​filzrev in #​9974.

🐛 Bug Fixes

• Restore source links for partial types extended by source generators by @​vicancy in #​11141.
• Fix local namespace links in managed reference documentation by resolving them through xrefs during site generation by @​vicancy in #​11163.
• Preserve nested XML blocks when inserting Markdown separators, preventing content from incorrectly rendering as code blocks by @​vicancy in #​11175.
• Preserve explicit false and 0 values when overwriting nullable properties by @​vicancy in #​11181.

📦 Dependency Updates

• Update Jint to 4.16.3 in #​11157.
• Update Markdig to 1.4.0 in #​11158 and #​11160.
• Update YamlDotNet to 18.1.0 in #​11167.
• Update PdfPig to 0.1.16 in #​11168.
• Update ICSharpCode.Decompiler to 11.1.0.9782 in #​11184.
• Update System.Composition to 10.0.12 in #​11165.

Upgrade Notes

Custom JavaScript template preprocessors now enforce a 30-second timeout and a 50-million-statement limit for each getOptions or transform invocation. Long-running custom scripts may need adjustment.

Full Changelog: dotnet/docfx@v2.80.1...v2.81.0

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