TASK: Tweak markdown a tiny bit

Author: kdambekalns

README.md

@@ -5,17 +5,16 @@ This plugin is a Search Plugin, to be used together with
 * [Flowpack.SimpleSearch.ContentRepositoryAdaptor](https://github.com/Flowpack/Flowpack.SimpleSearch.ContentRepositoryAdaptor).
 
 ## Installation
+
 Install via composer with your favorite adaptor:
 
 **ElasticSearch**
-```
-composer require flowpack/searchplugin flowpack/elasticsearch-contentrepositoryadaptor
-```
+
+    composer require flowpack/searchplugin flowpack/elasticsearch-contentrepositoryadaptor
 
 **SimpleSearch**
-```
-composer require flowpack/searchplugin flowpack/simplesearch-contentrepositoryadaptor
-```
+
+    composer require flowpack/searchplugin flowpack/simplesearch-contentrepositoryadaptor
 
 Inclusion of the routes from this package into your main `Configuration/Routes.yaml` is no longer needed as of Flow 4.0.