Task: Change 'docker-compose.yml' to 'docker-compose.yaml' in readme.…

…md (#126)

README.md

@@ -34,7 +34,7 @@ You don't need to have a PHP environment with composer installed.
 
 3. Part of the new project is a docker compose file
     * Run `` echo `id -u`:`id -g` `` to retrieve your local user and group id
-    * Open the `docker-compose.yml` file in an editor, uncomment all the `user: '1000:1000'` lines and update the ids if necessary
+    * Open the `docker-compose.yaml` file in an editor, uncomment all the `user: '1000:1000'` lines and update the ids if necessary
     * Start the needed services with `docker-compose up -d`
 
 4. Install pimcore and initialize the DB