fix: samples/client/petstore/java/rest-assured-jackson/pom.xml to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-ORGJETBRAINSKOTLIN-2393744

Author: snyk-bot

samples/client/petstore/java/rest-assured-jackson/pom.xml

@@ -285,7 +285,7 @@
         <jackson-databind-nullable-version>0.2.6</jackson-databind-nullable-version>
         <jakarta-annotation-version>1.3.5</jakarta-annotation-version>
         <beanvalidation-version>2.0.2</beanvalidation-version>
-        <okio-version>3.6.0</okio-version>
+        <okio-version>3.7.0</okio-version>
         <junit-version>5.10.3</junit-version>
     </properties>
 </project>