fix: samples/client/petstore/java/microprofile-rest-client-mutiny/pom.xml to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-ORGAPACHECXF-10755067

Author: snyk-bot

samples/client/petstore/java/microprofile-rest-client-mutiny/pom.xml

@@ -4,7 +4,7 @@
   <artifactId>microprofile-rest-client-mutiny</artifactId>
   <packaging>jar</packaging>
   <name>microprofile-rest-client-mutiny</name>
-  <description>This is a sample server Petstore server. For this sample, you can use the api key &#x60;special-key&#x60; to test the authorization filters.</description>
+  <description>This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.</description>
   <version>1.0.0</version>
   <build>
     <sourceDirectory>src/main/java</sourceDirectory>
@@ -172,7 +172,7 @@
     <microprofile.rest.client.api.version>2.0</microprofile.rest.client.api.version>
     <smallrye.rest.client.version>1.2.1</smallrye.rest.client.version>
     <smallrye.config.version>1.3.5</smallrye.config.version>
-    <cxf.rt.rs.extension.providers.version>3.2.6</cxf.rt.rs.extension.providers.version>
+    <cxf.rt.rs.extension.providers.version>3.5.11</cxf.rt.rs.extension.providers.version>
     <jaxb.core.version>2.2.11</jaxb.core.version>
     <jaxb.impl.version>2.2.11</jaxb.impl.version>
     <hibernate.validator.version>5.2.2.Final</hibernate.validator.version>