Add jmartisk to authors

Author: jmartisk

_data/authors.yaml

@@ -573,3 +573,10 @@ mariofusco:
   job_title: "Senior Principal Software Engineer"
   twitter: "mariofusco"
   bio: "Senior Principal Software Engineer at Red Hat ~ Java Champion ~ Open source advocate ~ Frequent speaker ~ @jugmilano coordinator ~ Drools project lead at RedHat ~ Pragmatic dreamer ~ Europeist"
+jmartisk:
+  name: "Jan Martiška"
+  email: "[email protected]"
+  emailhash: "165fddadd5535ca662008df08e8ad59b"
+  job_title: "Software Engineer"
+  twitter: "janmartiska"
+  bio: "Software engineer at Red Hat"