Revert "Github Actions pull_request synchronize runs on PR open anyway" (#2420)
Revert "Github Actions pull_request synchronize runs on PR open anyway" (#2420)

* Revert "Github Actions pull_request synchronize runs on PR open anyway (#2418)"

This reverts commit 8c72c5d0e64ea05de4dc633732972d6a08a1101d.

* Update pull_request.yaml
matrix-org/matrix-js-sdk,matrix-org/matrix-js-sdk,matrix-org/matrix-js-sdk,matrix-org/matrix-js-sdk