Update dependency com.coveo:fmt-maven-plugin to v2.9 (#652)

Author: renovate-bot

pom.xml

@@ -522,7 +522,7 @@
       <plugin>
         <groupId>com.coveo</groupId>
         <artifactId>fmt-maven-plugin</artifactId>
-        <version>2.6.0</version>
+        <version>2.9</version>
         <configuration>
           <style>google</style>
           <verbose>true</verbose>