fix: samples/server/petstore/jaxrs-resteasy/eap-java8/pom.xml to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-COMFASTERXMLJACKSONCORE-10500754

Author: snyk-bot

samples/server/petstore/jaxrs-resteasy/eap-java8/pom.xml

@@ -166,7 +166,7 @@ for this project used jakarta.validation-api -->
         <dependency>
             <groupId>com.fasterxml.jackson.datatype</groupId>
             <artifactId>jackson-datatype-jsr310</artifactId>
-            <version>2.9.9</version>
+            <version>2.15.0</version>
         </dependency>
         <dependency>
             <groupId>joda-time</groupId>
@@ -185,9 +185,9 @@ for this project used jakarta.validation-api -->
     </repositories>
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <swagger-core-version>1.5.18</swagger-core-version>
+        <swagger-core-version>1.6.12</swagger-core-version>
         <jetty-version>9.2.9.v20150224</jetty-version>
-        <resteasy-version>3.0.11.Final</resteasy-version>
+        <resteasy-version>3.0.21.Final</resteasy-version>
         <slf4j-version>1.6.3</slf4j-version>
         <junit-version>5.10.2</junit-version>
         <servlet-api-version>4.0.4</servlet-api-version>