Update README.adoc

Author: jonatan-ivanov

README.adoc

@@ -415,7 +415,7 @@ Go to root project's `pom.xml` and update the properties to point to proper depe
 $ otelVersion="1.0.0-M8" && ./mvnw versions:set -DnewVersion="${otelVersion}" -DgenerateBackupPoms=false && pushd spring-cloud-sleuth-otel-dependencies && ../mvnw versions:set -DnewVersion="${otelVersion}" -DgenerateBackupPoms=false && popd && pushd benchmarks && ../mvnw versions:set -DnewVersion="${otelVersion}" -DgenerateBackupPoms=false && popd
 ```
 
-IMPORTANT: Notice that we have to update the `otel-dependencies` module manually.
+IMPORTANT: Notice that we have to update the `otel-dependencies` and `benchmarks` modules manually.
 
 === Build the project