Jonathan Desrosiers 2d8ba7b566 Build/Test Tools: Prevent the workflow for testing old branches from running on forks.
This adds a conditional statement to ensure the workflow that tests old branches only runs on the official `wordpress-develop` mirror. This prevents it from running on forks and private mirrors.

See #52653.

git-svn-id: https://develop.svn.wordpress.org/trunk@50648 602fd350-edb4-49c9-b593-d223f7449a82
2021-04-02 16:20:24 +00:00
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2021-03-01 16:56:08 +00:00