Update docs/api-reference/data-fetching/get-static-props.md

Co-authored-by: Balázs Orbán <info@balazsorban.com>

Author: chozzz

docs/api-reference/data-fetching/get-static-props.md

@@ -41,7 +41,7 @@ The `context` parameter is an object containing the following keys:
 
 ## getStaticProps return values
 
-The `getStaticProps` function should return object with **any one of the following** properties:
+The `getStaticProps` function should return an object with **any one of the following** properties:
 
 ### `props`