Update docs/platforms/react-native/sourcemaps/uploading/expo.mdx

Author: lizokm

docs/platforms/react-native/sourcemaps/uploading/expo.mdx

@@ -55,7 +55,7 @@ npx sentry-expo-upload-sourcemaps dist
 #### Notes
 
 - `dist` is the default output directory of `eas update`.
-- Sentry Org, Sentry Project and Sentry Url will be loaded from expo plugin config (app.json / app.config.js) if environment variable is not set.
+- Sentry Org, Sentry Project, and Sentry Url will be loaded from the expo plugin config (app.json / app.config.js) if the environment variable isn't set.
 - Uploaded source maps have no associated releases. This is expected as updates can apply to multiple releases.
 
 ## Notes