Update the build table in dotnet/dotnet with all supported platforms

[ViktorHofer]

https://github.com/dotnet/dotnet/blob/main/docs/builds-table.md

This table is a copy of the one in SDK. We should update the table with any missing supported platform. Our current platform matrix is the following:

Full stack

• linux-arm
• linux-arm64
• linux-musl-arm
• linux-musl-arm64
• linux-musl-x64
• linux-x64
• osx-arm64
• osx-x64
• win-arm64
• win-x64
• win-x86

Short stack

• android-arm
• android-arm64
• android-x64
• android-x86
• browser-wasm
• browser-wasm (multi-threaded)
• ios-arm64
• iossimulator-arm64
• iossimulator-x64
• linux-arm64 (Mono LLVMAOT)
• linux-bionic-arm
• linux-bionic-x64
• linux-bionix-arm64
• linux-x64 (Mono LLVMAOT)
• maccatalyst-arm64
• maccatalyst-x64
• osx-x64 (Mono LLVMAOT)
• tvos-arm64
• tvossimulator-arm64
• tvossimulator-x64
• wasi-wasm

[ViktorHofer]

Comparing that list with the build table, all full stack verticals are represented. Looks like we are missing two badges for "linux-musl-arm" and "linux-musl-arm64".