fix: mockserver-examples/pom.xml to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-6444790

mockserver-examples/pom.xml

@@ -293,7 +293,7 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-webflux</artifactId>
             <!-- highest spring-boot-starter-webflux version is 2.x due to Java 1.8 version -->
-            <version>2.7.8</version>
+            <version>3.1.10</version>
             <exclusions>
                 <exclusion>
                     <groupId>org.osgi</groupId>