Updates the beautysh hook to use tabs, as this reduces the diff of the output. Updates .editorconfig to use spaces in Markdown files to match prettier formatting

.editorconfig

@@ -24,6 +24,9 @@ indent_style = space
 [*.rst]
 indent_style = space
 
+[*.md]
+indent_style = space
+
 # Tests don't get a line width restriction.  It's still a good idea to follow
 # the 79 character rule, but in the interests of clarity, tests often need to
 # violate it.