Update readme.md

Author: wimjongman

readme.md

@@ -116,7 +116,7 @@ and change the following from their defaults.
 
 My current settings are as follows:
 
-![alt text](images_plugin_dev_setup/Screenshot-Preferences 1.png "screen capture")
+![alt text](images_plugin_dev_setup/Screenshot-Preferences1.png "screen capture")
 ![alt text](images_plugin_dev_setup/Screenshot-Preferences 2.png "screen capture")
 ![alt text](images_plugin_dev_setup/Screenshot-Preferences 3.png "screen capture")
 ![alt text](images_plugin_dev_setup/Screenshot-Preferences 4.png "screen capture")