fix authors

Author: gabalafou

apps/labs/posts/uarray-intro.mdx

@@ -1,6 +1,6 @@
 ---
 title: '`uarray`: A Generic Override Framework for Methods'
-author: hameer-abbasi
+authors: [hameer-abbasi]
 published: April 30, 2019
 description: 'The problem is, stated simply: How do we use all of the PyData libraries in tandem, moving seamlessly from one to the other, without actually changing the API, or even the imports?'
 category: [PyData ecosystem]