Update editorconfig

Author: MatthijsBurgh

.editorconfig

@@ -9,10 +9,11 @@ insert_final_newline = true
 indent_style = space
 indent_size = 4
 
-[*.{sh,xml,launch}]
-indent_style = tab
-indent_size = 4
+[{**/*.json,**/*.yaml,**/*.yml}]
+indent_size = 2
+
+[**/*.md]
+trim_trailing_whitespace = false
 
 [{CMakeLists.txt,package.xml}]
-indent_style = space
 indent_size = 2