fix(docs): replace duplicate link (#2399)

Author: dtaylor84

projects/ngrx.io/content/marketing/resources.json

@@ -35,7 +35,7 @@
             "desc":
               "Mike Ryan talk about the benefits and complexity of NgRx, and introducing the SHARI principle",
             "url":
-              "https://www.youtube.com/playlist?list=PL8OUS498tQP3FFsZzULTGnbyIcILFjHd3",
+              "https://www.youtube.com/watch?v=omnwu_etHTY",
             "rev": true
           },
           "international-javascript-conference-london-2019": {