added an entry for yaml in the editorconfig

.editorconfig

@@ -6,7 +6,11 @@ root = true
 [*]
 indent_style = space
 indent_size = 4
+tab_width = 4
 end_of_line = lf
 charset = utf-8
 trim_trailing_whitespace = true
 insert_final_newline = true
+
+[*.{yaml,yml}]
+indent_size = 2