Updated README.md

Author: Andrey Helldar

README.md

@@ -117,7 +117,7 @@ If the value is `$once = false`, the `up` method will be called every time the `
 In this case, information about it will not be written to the `migration_actions` table and, therefore, the `down` method will not be called when the rollback
 command is called.
 
-#### Execution in a specific environment
+#### Execution In A Specific Environment
 
 In some cases, it becomes necessary to execute an action in a specific environment. For example `production`.