Fix MD linter issue

Author: spier

pattern-categorization/README.md

@@ -8,9 +8,10 @@ Now how do we make it easier for readers to discover the patterns that can help
 
 This first categorization effort uses a mind map to categorize patterns based on the different phases of an InnerSource Program, and the challenges that might appear in the respective phases. See [innersource-program-mind-map.html](innersource-program-mind-map.html). Note that this is still an incomplete visualization i.e. it does not contain all of our patterns.
 
-In the mind map you will see patterns categorized from left to right in increasing levels of detail .
+In the mind map you will see patterns categorized from left to right in increasing levels of detail.
 
 The logic for these levels is:
+
 - level 0: the InnerSource program itself (as the root)
 - level 1: phase of an InnerSource Program
 - level 2: problem category