fix typo's in readme (#25)

README.md

@@ -4,7 +4,7 @@ This is a simple open-source data wrapper that bridges the gap between your Post
 
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-### Pre-requisistes
+### Prerequisites
 
 - have the v0.2.6 of `clerk_fdw` extension enabled in your instance
 
@@ -86,7 +86,7 @@ options (
 );
 ```
 
-NOTE: There is a 0.5 second sleep timer between each request so that we do not overload clerk servers. The reponse might take a while and it is reccomended that you store the information in a local table for quick access.
+NOTE: There is a 0.5-second sleep timer between each request so that we do not overload clerk servers. The response might take a while, and it is recommended that you store the information in a local table for quick access.
 
 Query from the Foreign Table:
 `select * from clerk_users`