Upgrade to Caffeine 2.6.0

Closes gh-10915

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

@@ -33,7 +33,7 @@
 		<atomikos.version>4.0.4</atomikos.version>
 		<bitronix.version>2.1.4</bitronix.version>
 		<byte-buddy.version>1.7.8</byte-buddy.version>
-		<caffeine.version>2.5.6</caffeine.version>
+		<caffeine.version>2.6.0</caffeine.version>
 		<cassandra-driver.version>3.3.0</cassandra-driver.version>
 		<classmate.version>1.3.4</classmate.version>
 		<commons-beanutils.version>1.9.3</commons-beanutils.version>