Correct RFC number

Author: chriskrycho

text/0000-first-class-component-templates.md renamed to text/0779-first-class-component-templates.md

@@ -1,12 +1,12 @@
 ---
 Stage: Accepted
-Start Date: 2021-11-22
+Start Date: 2021-12-03
 Release Date: Unreleased
 Release Versions:
   ember-source: vX.Y.Z
   ember-data: vX.Y.Z
 Relevant Team(s): Ember.js, Learning, Ember CLI
-RFC PR: 
+RFC PR: https://github.com/emberjs/rfcs/pull/779
 ---
 
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