Change @since version to 7.0

Author: mheath

core/src/main/java/org/springframework/security/core/annotation/ExpressionTemplateSecurityAnnotationScanner.java

@@ -68,7 +68,7 @@
  * @author Josh Cummings
  * @author DingHao
  * @author Mike Heath
- * @since 6.4
+ * @since 7.0
  */
 final class ExpressionTemplateSecurityAnnotationScanner<A extends Annotation>
 		extends AbstractSecurityAnnotationScanner<A> {