Update dependency com.jcabi.incubator:xembly to v0.31.1

Author: renovate[bot]

pom.xml

@@ -115,7 +115,7 @@ SOFTWARE.
     <dependency>
       <groupId>com.jcabi.incubator</groupId>
       <artifactId>xembly</artifactId>
-      <version>0.28.1</version>
+      <version>0.31.1</version>
     </dependency>
     <dependency>
       <groupId>com.jcabi</groupId>