fix: pom.xml to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-6056394
- https://snyk.io/vuln/SNYK-JAVA-ORGYAML-6056527

pom.xml

@@ -88,7 +88,7 @@
 		<dependency>
 			<groupId>org.springdoc</groupId>
 			<artifactId>springdoc-openapi-ui</artifactId>
-			<version>1.2.32</version>
+			<version>1.6.4</version>
 		</dependency>
 
 		<!--	TEST dependencies	-->