Fix link to installation instructions on first steps (#2665)

docs/en/users/02_First_steps.md

@@ -2,7 +2,7 @@ Learning how to handle a new application is not always easy. We build FreshRSS t
 
 This section guides you to the pages you need as a new comer.
 
-[After installing the application](../admins/02_Installation.md), the first step is to add some feeds. You have a few options:
+[After installing the application](../admins/03_Installation.md), the first step is to add some feeds. You have a few options:
 
 1. [Add a feed manually](04_Subscriptions.md#adding-a-feed)
 2. [Import an OPML or JSON file](04_Subscriptions.md#import-and-export)