added ProductTank February event

Author: dustyjuhl

_data/events.yml

@@ -46,3 +46,10 @@
   details_url: "https://www.meetup.com/iowa-microsoft-azure-user-group/events/313067793/"
   date: "Feb 11"
   time: "12:00 - 1:00pm"
+
+- title: "Products Built on Relationships"
+  group: "ProductTank Des Moines/Ames"
+  location: "Lean TECHniques"
+  details_url: "https://www.meetup.com/producttank-des-moines-ames/events/313133560/"
+  date: "Feb 17"
+  time: "4:30 - 6:00pm"