Upgrade to Spring Security 6.0 M6.

Closes gh-717

Author: mp911de

pom.xml

@@ -29,7 +29,7 @@
 		<mockito-core.version>4.6.1</mockito-core.version>
 		<spring.version>6.0.0-M5</spring.version>
 		<spring-data-bom.version>2022.0.0-M4</spring-data-bom.version>
-		<spring-security-bom.version>6.0.0-SNAPSHOT</spring-security-bom.version>
+		<spring-security-bom.version>6.0.0-M6</spring-security-bom.version>
 		<reactor.version>2022.0.0-M4</reactor.version>
 		<java.version>17</java.version>
 		<project.type>multi</project.type>