Merge pull request #7961 from sammyskills/installation-docs

docs: fixed installation images and typo

Author: kenjis

user_guide_src/source/images/debugbar.png

@@ -208,7 +208,7 @@ See :ref:`initial-configuration` for the details.
 Upgrading
 ---------
 
-Whenever there is a new release, then from the command line in your project root::
+Whenever there is a new release, then from the command line in your project root:
 
 .. code-block:: console