Update dependency io.wcm.devops.conga:conga-maven-plugin to v1.17.6

Author: renovate[bot]

conga-sling-plugin/src/it/example/pom.xml

@@ -45,7 +45,7 @@
       <plugin>
         <groupId>io.wcm.devops.conga</groupId>
         <artifactId>conga-maven-plugin</artifactId>
-        <version>1.17.5-SNAPSHOT</version>
+        <version>1.17.6</version>
         <extensions>true</extensions>
         <dependencies>