Merge pull request #243 from ob1/patch-1

Typo fix for legacy file extensions (.resi->.rei)

Author: bobzhang

_blogposts/2020-08-10-bucklescript-is-rebranding.mdx

@@ -58,7 +58,7 @@ It's worth emphasizing that while this rebranding seems disruptive, it's mostly
 
 **What's that recently released BuckleScript syntax called?**
 
-There's no dedicated name for the syntax anymore. It's simply called the ReScript syntax. The extension is `.res` and `.resi`. Existing tools operating on `.ml`, `.mli`, `.re` and `.resi` continue working.
+There's no dedicated name for the syntax anymore. It's simply called the ReScript syntax. The extension is `.res` and `.resi`. Existing tools operating on `.ml`, `.mli`, `.re` and `.rei` continue working.
 
 **Will there be a migration script to gradually convert our code to the new syntax?**