Update dependency org.springdoc:springdoc-openapi-ui to v1.6.4

Author: renovate-bot

pom.xml

@@ -61,7 +61,7 @@
         <dependency>
             <groupId>org.springdoc</groupId>
             <artifactId>springdoc-openapi-ui</artifactId>
-            <version>1.6.1</version>
+            <version>1.6.4</version>
         </dependency>
 
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