2.0 blog post: add a notice about print width

website/blog/2020-03-21-2.0.0.md

@@ -18,6 +18,8 @@ After a long and careful consideration, we decided to change the default values
 
 Previously, any method call chain of length three or longer would be automatically broken into multiple lines. The new heuristic is based on the complexity of the call arguments in the chain, rather than simply on the chain's length. Now, if chained method calls have arguments which aren't easy to understand at a glance (e.g. functions or deeply-nested objects), the chain is broken. Otherwise, they're allowed to remain on one line. See prior issues [#3197](https://github.com/prettier/prettier/issues/3107), [#4765](https://github.com/prettier/prettier/pull/4765), [#1565](https://github.com/prettier/prettier/issues/1565) and [#4125](https://github.com/prettier/prettier/pull/4125) for context and examples.
 
+To get best results, make sure your value for the [`printWidth` option](/docs/en/options.html#print-width) isn't too high.
+
 <!-- prettier-ignore -->
 ```javascript
 // Prettier 1.19