Fixes to broken tab constructs for Kafka output plugin doc. Part of issue #1916.

Signed-off-by: Eric D. Schabell <[email protected]>

Author: eschabell

pipeline/outputs/kafka.md

@@ -198,7 +198,7 @@ This example Fluent Bit configuration file creates example records with the
 _payloadkey_ and _msgkey_ keys. The _msgkey_ value is used as the Kafka message
 key, and the _payloadkey_ value as the payload.
 
-% tabs %}
+{% tabs %}
 {% tab title="fluent-bit.yaml" %}
 
 ```yaml