Update dependency org.springframework.security:spring-security-core to v5.8.12

Author: renovate[bot]

maven-demo/pom.xml

@@ -8,7 +8,7 @@
 	<dependency>
     	<groupId>org.springframework.security</groupId>
     	<artifactId>spring-security-core</artifactId>
-    	<version>5.4.7</version>
+    	<version>5.8.12</version>
 	</dependency>
 	<!-- https://mvnrepository.com/artifact/joda-time/joda-time -->
 	<dependency>