update C# regex-redux to source-generated
Now 7.0 has[ been released](https://dotnet.microsoft.com/en-us/download/dotnet/7.0) it would be great to show numbers for the source-generated version of regex-redux. It moves regex compilation to compile time.

I see you added one @hanabi1224 here:

https://github.com/hanabi1224/Programming-Language-Benchmarks/blob/dfb7e217f8b772e8fff7d4aa525dd4bda1ca18c1/bench/algorithm/regex-redux/5p-m.cs

but I don't see a result listed here

https://programming-language-benchmarks.vercel.app/problem/regex-redux

Note that in the final 7.0 bits the attribute name is "[GeneratedRegex]" not "[RegexGenerator]"

cc @stephentoub