fix: samples/openapi3/client/petstore/jaxrs-cxf-client-jackson-nullab…

…le/pom.xml to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-COMFASTERXMLJACKSONCORE-608664
- https://snyk.io/vuln/SNYK-JAVA-COMFASTERXMLJACKSONCORE-450917

samples/openapi3/client/petstore/jaxrs-cxf-client-jackson-nullable/pom.xml

@@ -4,7 +4,7 @@
   <artifactId>openapi-jaxrs-client</artifactId>
   <packaging>jar</packaging>
   <name>openapi-jaxrs-client</name>
-  <description>This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \&quot; \\</description>
+  <description>This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\</description>
   <version>1.0.0</version>
   <build>
     <sourceDirectory>src/main/java</sourceDirectory>
@@ -179,7 +179,7 @@
     <logback-version>1.1.7</logback-version>
     <servlet-api-version>2.5</servlet-api-version>
     <cxf-version>3.3.0</cxf-version>
-    <jackson-jaxrs-version>2.9.9</jackson-jaxrs-version>
+    <jackson-jaxrs-version>2.10.0</jackson-jaxrs-version>
     <javax-annotation-version>1.3.2</javax-annotation-version>
     <jackson-databind-nullable-version>0.2.1</jackson-databind-nullable-version>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>