Update RELEASING.md to encourage release branches. #4139

Job	Run time
Api check	2m 26s
Dependency Guard	2m 15s
Build all	3m 13s
ArtifactsCheck	5m 50s
Instrumentation tests (31, 1)	4m 33s
iOS Tests	5m 9s
JS Tests	2m 19s
Instrumentation tests (31, 2)	7m 56s
Conflate Stale Renderings Runtime JVM Tests	2m 4s
Instrumentation tests (31, 3)	11m 52s
Render On State Change Only and Conflate Stale Runtime JVM Tests	1m 59s
Render On State Change Only Runtime JVM Tests	2m 9s
KtLint	2m 40s
Performance tests (31)	8m 41s
Alternate Runtime Instrumentation tests (31, 1, conflate)	7m 26s
Shard Matrix Yaml	2m 39s
Build Tutorials	2m 50s
Alternate Runtime Instrumentation tests (31, 1, baseline-stateChange)	7m 42s
Alternate Runtime Instrumentation tests (31, 1, conflate-stateChange)	7m 32s
Alternate Runtime Instrumentation tests (31, 2, conflate)	7m 58s
Alternate Runtime Instrumentation tests (31, 2, baseline-stateChange)	8m 25s
Alternate Runtime Instrumentation tests (31, 2, conflate-stateChange)	7m 49s
Alternate Runtime Instrumentation tests (31, 3, conflate)	11m 41s
Alternate Runtime Instrumentation tests (31, 3, baseline-stateChange)	11m 38s
Alternate Runtime Instrumentation tests (31, 3, conflate-stateChange)	11m 16s
Dokka	4m 8s
Check	4m 54s
Android Lint	3m 32s
all-green	2s
	2h 42m 38s

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