Fix broken link to developing-operators
Seems like the rendered files don't have a `.md` ending.
@@ -37,4 +37,4 @@ Follow the instructions in the [Apache Kafka example](/docs/examples/apache-kafk
## Create your first operator
-To see the powers of KUDO unleashed in full, you should try [creating your own operator](/docs/developing-operators.md).
\ No newline at end of file
+To see the powers of KUDO unleashed in full, you should try [creating your own operator](/docs/developing-operators).
