Update README.md

Author: thnguyendev

README.md

@@ -367,7 +367,7 @@ This example will create a Web API that returns data from SQLite with Doctrine,
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-## Firebase Jwt authorization
+## Firebase jwt authorization
 This example demonstrate authentication with Firebase Jwt.
 1. Follow steps 1 to 3 from Quick start to setup new project.
 2. Modify file [project folder]/composer.json