fix(deps): update dependency org.springframework.security:spring-security-bom to v5.7.3

Author: renovate[bot]

pom.xml

@@ -71,7 +71,7 @@
 		<spring.version>5.3.22</spring.version>
 
 		<!-- Spring Security -->
-		<spring-security.version>5.7.2</spring-security.version>
+		<spring-security.version>5.7.3</spring-security.version>
 		<spring-security-oauth2.version>2.5.2.RELEASE</spring-security-oauth2.version>
 		<spring-security-saml2.version>1.0.10.RELEASE</spring-security-saml2.version>