adding spaces in curl example for redability.

Author: deepwired

README.md

@@ -28,7 +28,7 @@
 * [Using Espresso with BrowserStack](https://www.browserstack.com/app-automate/espresso/get-started)
 * [Generating JUnit XML report or Test coverage report using Espresso with BrowserStack](https://www.browserstack.com/docs/app-automate/espresso/view-test-reports). 
    example:  
-   curl -u "<username>:<password>" \
+   curl -u "< username >:< password >" \
    -X POST "https://api-cloud.browserstack.com/app-automate/espresso/v2/build" \
    -d '{"app": "bs://<app_id>", "testSuite": "bs://<test_suite_id>", "devices": ["Google Pixel-8.0"], "coverage": true, "enableSpoonFramework": true }' \
    -H "Content-Type: application/json"