Bump xmldoc2markdown from 5.0.0 to 6.0.0

[dependabot]

Updated xmldoc2markdown from 5.0.0 to 6.0.0.

Release notes

Sourced from xmldoc2markdown's releases.

6.0.0

Added

• Target-platform presets --platform <plain|github-pages|jekyll|gitlab-wiki|just-the-docs|docusaurus> with per-knob overrides --link-extension and --link-prefix. #​22
• YAML front matter emission via --front-matter <none|jekyll|just-the-docs|docusaurus>, with extra static keys via repeatable --front-matter-field key=value. #​36
• <inheritdoc/> expansion — merges documentation from the inheritance source, with cycle protection and per-param/typeparam/exception matching. #​41
• Records recognised — record class and readonly record struct on the type signature; compiler-synthesised members filtered out. #​39
• Generic constraints (where T : …) rendered after the parameter list for types and methods.
• Method virtuality emitted: virtual, override, sealed override, and best-effort new.
• Default and static abstract interface members rendered with canonical C# modifiers.
• Parameter modifiers (ref, in, out, params) and default values in signatures and per-parameter prose.
• Nullable reference types (string?, IEnumerable<string?>?, etc.) via NullabilityInfoContext; Nullable<T> collapsed to T?.
• Tuples render as (int X, string Y) instead of ValueTuple<int, string>.
• async modifier emitted on method signatures.
• init accessor replaces set; on init-only properties.
• Enum underlying types shown when they differ from int (e.g. public enum MyByteEnum : byte).
• required modifier emitted on fields and properties.
• readonly struct and ref struct keywords rendered on type signatures.
• Operators documented in their own section (operator +, implicit operator T, etc.).
• Indexers render as this[T index] in their own Indexers section.

Performance

• Performance improvements.

Fixes

• Nested public types (IsNestedPublic) were not documented.
• Partially loadable assemblies no longer crash the run; ReflectionTypeLoadException falls back to ex.Types with a warning.
• cref parameter counting corrected: Foo() counted as zero params; generic arguments with commas no longer over-counted.
• Enum field tables tolerate | in summaries — escaped as &#​124;.
• MemberTypesAliases reverse lookups now return the correct general member type.
• Output directory is created up front even when no types successfully render.
• Generic-type crefs (e.g. Dictionary{TKey,TValue}) now resolve to working links.
• Self-closing <see cref="..."/> no longer renders as empty — falls back to the parsed display name.
• Non-public members are now resolved by cref lookups.
• Unresolvable cref fallback uses inline code instead of plain text.
• Nested-type crefs now produce working links (CLR + nesting vs XML . separator). #​31
• Members referencing unresolvable external types no longer drop the entire type page; the member renders as a name-only heading with a warning. #​40
• External Microsoft-owned types (System.*, Microsoft.*, Windows.*) now link to MS Learn. #​42
• MS docs links migrated from docs.microsoft.com to learn.microsoft.com.

Breaking changes

• --github-pages and --gitlab-wiki options removed — migrate to --platform github-pages / --platform gitlab-wiki.

Commits viewable in compare view.

[skuirrels]

Merged via #68, which cherry-picked this commit onto the current main so the three bumps could pass branch protection in one CI round.

[dependabot]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version. You can also ignore all major, minor, or patch releases for a dependency by adding an ignore condition with the desired update_types to your config file.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.