Update dependency org.springframework.security:spring-security-bom to v6.4.3 (#10296)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

bom/pom.xml

@@ -71,7 +71,7 @@ THE SOFTWARE.
         <!-- https://docs.spring.io/spring-security/reference/6.3/getting-spring-security.html#getting-maven-no-boot -->
         <groupId>org.springframework.security</groupId>
         <artifactId>spring-security-bom</artifactId>
-        <version>6.4.2</version>
+        <version>6.4.3</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>