Update 'motionmark1.3-tentative' plan file to include https://github.com/WebKit/MotionMark/commit/f7e7ee3cd683b5d1715f60f1a652224a9c4c72d4.
Pull request: https://github.com/WebKit/WebKit/pull/17821
Committed 268033@main (cc47c924f015): <https://commits.webkit.org/268033@main> Reviewed commits have been landed. Closing PR #17821 and removing active labels.
<rdar://problem/115568631>