Fix typos in runtime type check explanation

Corrected typos for clarity and accuracy in the README.

Author: syedahmedx3

README.md

@@ -1553,7 +1553,7 @@ const useCurrentUser = () => {
 };
 ```
 
-Using a runtime type check in this will has the benefit of printing a clear error message in the console when a provider is not wrapping the components properly. Now it's possible to access `currentUser.username` without checking for `null`:
+Using a runtime type check in this will have the benefit of printing a clear error message in the console when a provider is not wrapping the components properly. Now it's possible to access `currentUser.username` without checking for `null`:
 
 ```tsx
 import { useContext } from "react";
@@ -1913,7 +1913,7 @@ function App() {
           >
             I'm a modal!{" "}
             <button
-              style={{ background: "papyawhip" }}
+              style={{ background: "papayawhip" }}
               onClick={() => setShowModal(false)}
             >
               close