Remove a sentence starting with "Note"

Since the instructions sometimes include "Note: Blah blah blah" I
decided to remove the "Note" from Olivia the Owl's comment.

Alternatively, she might say "Note that the key only..." but when in
doubt, leave it out. I looked and generally she doesn't say "Note: ..."

Author: ianjmacintosh

exercises/10.arrays/01.solution.key-prop/README.mdx

@@ -5,7 +5,7 @@
 👨‍💼 Great work. That was super weird and confusing for our users. They're much
 happier now.
 
-🦉 Note, the key only needs to be unique within a given array. So this works
+🦉 The key only needs to be unique within a given array. So this works
 fine:
 
 ```tsx