docs(reactive-forms): change technology -> technique

Author: kapunahelewong

public/docs/ts/latest/guide/reactive-forms.jade

@@ -1,7 +1,7 @@
 include ../_util-fns
 
 :marked
-  _Reactive forms_ is an Angular technology for creating forms in a _reactive_ style.
+  _Reactive forms_ is an Angular technique for creating forms in a _reactive_ style.
   This guide explains reactive forms as you follow the steps to build a "Hero Detail Editor" form.
 
 a#toc