Change pip link

Author: shoumikchow

docs/installation.rst

@@ -8,13 +8,13 @@ Installation
 Stable release
 --------------
 
-To install bbox_visualizer, run this command in your terminal:
+To install bbox-visualizer, run this command in your terminal:
 
 .. code-block:: console
 
-    $ pip install bbox_visualizer
+    $ pip install bbox-visualizer
 
-This is the preferred method to install bbox_visualizer, as it will always install the most recent stable release.
+This is the preferred method to install bbox-visualizer, as it will always install the most recent stable release.
 
 If you don't have `pip`_ installed, this `Python installation guide`_ can guide
 you through the process.