Give camera&microphone perms to constraint exerciser demo (mdn#40571)

Author: Josh-Cena

files/en-us/web/api/media_capture_and_streams_api/constraints/index.md

@@ -600,7 +600,7 @@ function handleError(reason) {
 
 Here you can see the complete example in action.
 
-{{EmbedLiveSample("Example_Constraint_exerciser", 650, 800)}}
+{{EmbedLiveSample("Example_Constraint_exerciser", 650, 1200, , , , "camera;microphone")}}
 
 ## Specifications