Update dependency org.apache.camel.springboot:camel-spring-boot-dependencies to v3.21.0

Author: renovate[bot]

pom.xml

@@ -13,7 +13,7 @@
 
 	<properties>
 		<java.version>11</java.version>
-		<camel.version>3.19.0</camel.version>
+		<camel.version>3.21.0</camel.version>
 		<spring.boot-version>2.7.6</spring.boot-version>
 
 		<maven.compiler.source>1.8</maven.compiler.source>