Update gettingStarted.rst

Fix composer package names in installation instructions

Author: ramon-b

docs/source/gettingStarted.rst

@@ -8,8 +8,8 @@ The recommended way to install php-json-model-generator is through `Composer <ht
 
 .. code-block:: rconsole
 
-    composer require --dev wol-soft/php-json-model-generator
-    composer require wol-soft/php-json-model-generator-exception
+    composer require --dev wol-soft/php-json-schema-model-generator
+    composer require wol-soft/php-json-schema-model-generator-exception
 
 To avoid adding all dependencies of the php-json-model-generator to your production dependencies it's recommended to add the library as a dev-dependency and include the php-json-model-generator-exception library. The exception library provides all classes to run the generated code. Generating the classes should either be a step done in the development environment (if you decide to commit the models) or as a build step of your application.