Fix build warnings

[gewarren]

No description provided.

[Copilot]

Pull request overview

This PR fixes build warnings in XML documentation files by correcting the format of cross-reference links to generic types. The changes update xref references from URL-encoded format (%60%601) to the proper backtick format (`1) for generic type parameters.

• Updated xref references for generic attributes to use the correct backtick syntax
• Ensured consistency across multiple attribute references in documentation

Reviewed changes

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

File	Description
xml/System.Runtime.InteropServices/TypeMapAttribute`1.xml	Fixed xref references to use backtick syntax for generic types in lines 44 and 68
xml/System.Runtime.InteropServices/TypeMapAssociationAttribute`1.xml	Fixed xref references to use backtick syntax for generic types in lines 40 and 65

The changes are correct and address the build warnings appropriately. All xref references now use the proper format for referencing generic types in XML documentation, and the referenced type names are accurate.