Bump org.jetbrains.kotlin.jvm from 1.9.20 to 1.9.21 #195

Job	Run time
Provide versions for testing	1m 18s
Gradle cross version tests (5.5.1)	2m 24s
Gradle cross version tests (5.6.4)	2m 45s
Gradle cross version tests (6.0.1)	2m 52s
Gradle cross version tests (6.9.4)	2m 24s
Gradle cross version tests (7.0.2)	2m 27s
Gradle cross version tests (7.6.1)	2m 37s
Gradle cross version tests (8.0.2)	2m 38s
Gradle cross version tests (8.1.1)	2m 26s
Gradle cross version tests (8.2-rc-1)	2m 58s
	24m 49s

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