Upgrade to JUnit Jupiter 5.5.0-RC2

See gh-17266

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

@@ -136,7 +136,7 @@
 		<jstl.version>1.2</jstl.version>
 		<jtds.version>1.3.1</jtds.version>
 		<junit.version>4.12</junit.version>
-		<junit-jupiter.version>5.5.0-RC1</junit-jupiter.version>
+		<junit-jupiter.version>5.5.0-RC2</junit-jupiter.version>
 		<kafka.version>2.2.1</kafka.version>
 		<kotlin.version>1.3.31</kotlin.version>
 		<lettuce.version>5.1.7.RELEASE</lettuce.version>