Update README and Automation Script to include documentation dashboard. (#3899)

* update to real performance branch

* update README to include perf and other stuff

* dont include reliablereset stuff yet, not in this pr

---------

Co-authored-by: Jack He <jackhe@microsoft.com>

README.md

@@ -1,5 +1,6 @@
 <h1 align="center"><img src="docs/images/readme_logo.png" width="500" alt="MsQuic logo"/></h1>
 
+[![Documentation](https://img.shields.io/static/v1?label=Documentation&message=Dashboard&color=blue)](https://microsoft.github.io/msquic/msquicdocs/docs/API.html)
 [![Perf Dashboard](https://img.shields.io/static/v1?label=Performance&message=Dashboard&color=blue)](https://microsoft.github.io/msquic/)
 [![Build Status](https://img.shields.io/github/actions/workflow/status/microsoft/msquic/build.yml?query=branch%3Amain&label=Build)](https://github.com/microsoft/msquic/actions/workflows/build.yml?query=branch%3Amain)
 [![Test Status](https://img.shields.io/github/actions/workflow/status/microsoft/msquic/test.yml?query=branch%3Amain&label=Test)](https://github.com/microsoft/msquic/actions/workflows/test.yml?query=branch%3Amain)

scripts/update-docfx-site.ps1

@@ -4,7 +4,7 @@ $env:GIT_REDIRECT_STDERR = '2>&1'
 git fetch
 # Stash any changes to the current branch
 git stash
-git checkout performance-dupe
+git checkout performance
 
 # Commit the output file.
 git config user.email "quicdev@microsoft.com"