The link for CA2010 is missing on https://github.com/dotnet/roslyn-analyzers/blob/master/src/Microsoft.CodeAnalysis.FxCopAnalyzers/Microsoft.CodeAnalysis.FxCopAnalyzers.md.
The link is also missing from https://docs.microsoft.com/en-us/visualstudio/code-quality/fxcop-rule-port-status
This is a chicken and egg problem. The link needs to exist to be on the diagnostic and the diagnostic needs to exist to have documentation.
I propose that the links be like C# compiler message links and have just the ID. This way, a diagnostic can have a link automatically assigned.
Rule has been deprecated/removed: https://github.com/dotnet/roslyn-analyzers/pull/3581