Boyscout: update documentation to reflect changes to @supabase/postgrest-js

web/docs/library/get.mdx

@@ -236,7 +236,7 @@ supabase
   .single()
 ```
 
-Returns the first row of the table as an object and **not** as an array.
+Returns only the first row of the table.
 
 ----
 

web/docs/library/post.mdx

@@ -56,8 +56,8 @@ supabase
   .insert(data, options?)
 ```
 
-#### `data: array`
-Array of rows of type `object` which contain information to be saved into the selected table.
+#### `data: { array | object }`
+A single `object` or an array of rows of type `object` which contain information to be saved into the selected table.
  
 #### `options: object?`  
 @todo