Change branch name in README.md

Author: niklasnatter

README.md

@@ -7,4 +7,4 @@ Consumer for synchronization products with sylius.
 ## Documentation
 
 The the documentation is stored in the
-[Resources/doc/](https://github.com/sulu/SuluSyliusConsumerBundle/blob/master/Resources/doc) folder.
+[Resources/doc/](https://github.com/sulu/SuluSyliusConsumerBundle/blob/0.x/Resources/doc) folder.

Upgrade.md

@@ -1,6 +1,6 @@
 # Upgrade
 
-## dev-develop
+## 0.x
 
 ```sql
 ALTER TABLE ca_categories ADD syliusCode VARCHAR(255) DEFAULT NULL;