swagger dependency added for gateway

Author: prasath116

reactive-micro-service/gateway-service/pom.xml

@@ -37,7 +37,12 @@
 <dependency>
 <groupId>org.springdoc</groupId>
 <artifactId>springdoc-openapi-webflux-core</artifactId>
-<version>1.2.31</version>
+<version>${springdoc.version}</version>
+</dependency>
+<dependency>
+<groupId>org.springdoc</groupId>
+<artifactId>springdoc-openapi-webflux-ui</artifactId>
+<version>${springdoc.version}</version>
 </dependency>
 </dependencies>