Added reference in Linq documentation from Xyz to XyzBy

[EikeSchwass]

Summary

Added reference in Linq documentation from Xyz to XyzBy (e.g. Union to UnionBy)

Fixes #10133

[dotnet-policy-service]

Tagging subscribers to this area: @dotnet/area-system-linq

[learn-build-service-prod]

Learn Build status updates of commit 12b6758:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/System.Linq/Enumerable.xml	✅Succeeded	View

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[BillWagner]

@gewarren This looks fine, but I wanted you to take a look before it's merged.

[EikeSchwass]

@BillWagner is there a way for me to preview the changes? I did find a preview link in the build overview, but don't have permissions to view it.

[gewarren]

Thanks for adding these. It's better to use <seealso> when linking to another API. I left a suggestion whose pattern you could apply to all the links you added.

[learn-build-service-prod]

Learn Build status updates of commit 80a68c9:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/System.Linq/Enumerable.xml	✅Succeeded	View

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[gewarren]

Thank you @EikeSchwass! The custom link text part isn't working unfortunately, and I've logged a bug for that.