fix: samples/server/petstore/jaxrs-resteasy/default-value/pom.xml to …

…reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-LOG4J-572732

samples/server/petstore/jaxrs-resteasy/default-value/pom.xml

@@ -190,7 +190,7 @@
         <jackson-version>2.11.2</jackson-version>
         <jetty-version>9.2.9.v20150224</jetty-version>
         <resteasy-version>3.13.0.Final</resteasy-version>
-        <slf4j-version>1.6.3</slf4j-version>
+        <slf4j-version>1.7.34</slf4j-version>
         <junit-version>4.13.1</junit-version>
         <servlet-api-version>2.5</servlet-api-version>
     </properties>