Exclude MD046 as it shows false positives

Change-Id: I244b398cbc9e68a3e02f1b6caf9c343ab110186e
diff --git a/mdl_relaxed.rb b/mdl_relaxed.rb
index bebc671..478ea9e 100644
--- a/mdl_relaxed.rb
+++ b/mdl_relaxed.rb
@@ -51,3 +51,7 @@
 
 # Gitbook won't care about multiple blank lines
 exclude_rule 'MD012'
+
+# Causes failures within code block when MD031 is also excluded
+exclude_rule 'MD046'
+