message: fix typo in intro doc
diff: @@ -15,7 +15,7 @@ Hasura Backend Plus runs in a separate Docker container along side Postgres and
  - Two-factor authentication support.
  - Third-party OAuth providers such as GitHub, Google, Facebook, Twitter etc.
  - Magic Link support.
  -- Built in transactional emails such as account acitvation and password reset.
  +- Built in transactional emails such as account activation and password reset.
  - Rate limiting.
  - Optional checking for [Pwned Passwords](https://haveibeenpwned.com/Passwords).
  