Fixes in README.md

Fix misspelled word and link in the repo structure section.

Author: sman-dsac

README.md

@@ -72,10 +72,10 @@ A list of core team members responsible for the code and documentation in this r
 
 ## Repository Structure
 
-This is the main repository for the Naitonal Provider Directory (NPD) workstream. You will find more information about each component in a README.md file within its respective directory.
+This is the main repository for the National Provider Directory (NPD) workstream. You will find more information about each component in a README.md file within its respective directory.
 
 - [backend](./backend/): FHIR Provider Directory API and directory browser
-- [frontend](./backend/): Directory browser React application
+- [frontend](./frontend/): Directory browser React application
 - [flyway](./flyway/): Database migrations
 - [playwright](./playwright/): End-to-end test suite