Fixing typos.

Author: pneedle-rh

modules/cluster-logging-collector-json.adoc

@@ -42,7 +42,7 @@ oc set env ds/rsyslog MERGE_JSON_LOG=true <1>
 
 *Setting MERGE_JSON_LOG and CDM_UNDEFINED_TO_STRING*
 
-If you set the `MERGE_JSON_LOG` and `CDM_UNDEFINED_TO_STRING` enviroment variables to `true`, you might receive an Elasticsearch *400* error. The error occurs because when `MERGE_JSON_LOG=true`, Fluentd adds fields with data types other than *string*. When you set `CDM_UNDEFINED_TO_STRING=true`, Fluentd attempts to add those fields as a *string* value resulting in the Elasticsearch *400* error. The error clears when the indices roll over for the next day.
+If you set the `MERGE_JSON_LOG` and `CDM_UNDEFINED_TO_STRING` environment variables to `true`, you might receive an Elasticsearch *400* error. The error occurs because when `MERGE_JSON_LOG=true`, Fluentd adds fields with data types other than *string*. When you set `CDM_UNDEFINED_TO_STRING=true`, Fluentd attempts to add those fields as a *string* value resulting in the Elasticsearch *400* error. The error clears when the indices roll over for the next day.
 
 When Fluentd rolls over the indices for the next day's logs, it will create a brand new index. The field definitions are updated and you will not get the *400* error.