[typespec-next] Git merge fails on Windows

[mikeharder]

git merge origin/main
========================== Starting Command Output ===========================
"C:\Windows\system32\cmd.exe" /D /E:ON /V:OFF /S /C "CALL "D:\a\_work\_temp\0c3822fd-fc5b-444c-be70-9997d1e5ab60.cmd""
Committer identity unknown

*** Please tell me who you are.

Run

  git config --global user.email "you@example.com"
  git config --global user.name "Your Name"

to set your account's default identity.
Omit --global to set the identity only in this repository.

fatal: unable to auto-detect email address (got 'cloudtest@07d9db77c00000D.(none)')

https://dev.azure.com/azure-sdk/public/_build/results?buildId=2991227&view=logs&j=3e1f1869-f3c0-5969-4002-62fd696d51dd&t=b8d6701c-a249-5e70-c5ee-50a1fd2a096e&l=26

[mikeharder]

Fixed by #25276