Upgrade to Kotlin Coroutines 1.3.8

Closes gh-22449

spring-boot-project/spring-boot-dependencies/pom.xml

@@ -145,7 +145,7 @@
 		<junit-jupiter.version>5.5.2</junit-jupiter.version>
 		<kafka.version>2.3.1</kafka.version>
 		<kotlin.version>1.3.72</kotlin.version>
-		<kotlin-coroutines.version>1.3.7</kotlin-coroutines.version>
+		<kotlin-coroutines.version>1.3.8</kotlin-coroutines.version>
 		<lettuce.version>5.2.2.RELEASE</lettuce.version>
 		<liquibase.version>3.8.9</liquibase.version>
 		<log4j2.version>2.12.1</log4j2.version>