Bump version to 5.9 (#61218) #61

Job	Run time
baselines	13m 37s
browser-integration	2m 37s
coverage	1s
format	24s
knip	28s
lint	57s
misc	24s
package-size	0s
self-check	59s
smoke	52s
typecheck	38s
Test Node 22 on ubuntu-latest	12m 21s
Test Node 20 on ubuntu-latest	13m 12s
Test Node 18 on ubuntu-latest	14m 11s
Test Node 16 on ubuntu-latest	13m 58s
Test Node 14 on ubuntu-latest	14m 22s
Test Node 22 on windows-latest	14m 50s
Test Node 20 on windows-latest	14m 44s
Test Node 18 on windows-latest	15m 27s
Test Node 16 on windows-latest	15m 52s
Test Node 14 on windows-latest	15m 58s
Test Node 22 on macos-latest	10m 23s
Test Node 20 on macos-latest	9m 0s
Test Node 18 on macos-latest	11m 23s
Test Node 16 on macos-latest	10m 38s
Test Node lts/* on ubuntu-latest with --no-bundle	16m 35s
	3h 43m 51s

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