chore(dx): Add PR Creation instructions (#5797) #11972

Job	Run time
Ready-to-merge gate / Missing "ready-to-merge" label	4s
diff_check / diff_check	4s
Build new android production no-frameworks	8m 55s
Build legacy macos production no-frameworks	6m 39s
Build legacy ios dev no-frameworks	9m 16s
Build new ios production no-frameworks	10m 38s
Build legacy macos dev no-frameworks	6m 21s
Build legacy android dev no-frameworks	9m 29s
Build new ios dev no-frameworks	10m 40s
Build legacy ios dev dynamic-frameworks	9m 31s
Build legacy ios production no-frameworks	9m 25s
Build legacy ios production dynamic-frameworks	9m 46s
Build legacy android production no-frameworks	14m 40s
Build new android dev no-frameworks	14m 58s
Test ${{ matrix.platform }} ${{ matrix.build-type }} REV2	0s
	2h 0m 26s

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