Updated with data_template (#9994)

Changed "data:" in "data_template:" as suggested in:
https://www.home-assistant.io/docs/automation/templating/

source/_components/blink.markdown

@@ -220,7 +220,7 @@ Again, this example assumes your camera's name (in the blink app) is `My Camera`
       to: 'on'
   action:
       service: blink.save_video
-      data:
+      data_template:
           name: "My Camera"
           filename: "/tmp/videos/blink_video_{{ now().strftime('%Y%m%d_%H%M%S') }}.mp4"