Update README.md

plugin/forward/README.md

@@ -23,7 +23,7 @@ This plugin can only be used once per Server Block.
 
 How does *forward* relate to *proxy*? This plugin is the "new" version of *proxy* and is faster
 because it re-uses connections to the upstreams. It also does in-band health checks - using DNS
-instead of HTTP. Since it is newer it has a little less (production) millage on it.
+instead of HTTP. Since it is newer it has a little less (production) milage on it.
 
 ## Syntax