docs: Fix Markdown syntax blooper

Author: alerque

intl-memoizer/README.md

@@ -20,7 +20,7 @@ instance is read-only during its life time, with constructor being expensive, an
 `format`/`select` calls being cheap.
 
 In result it pays off to use a singleton to manage memoization of all instances of intl
-APIs such as `PluralRules`, DateTimeFormat` etc. between all `FluentBundle` instances.
+APIs such as `PluralRules`, `DateTimeFormat` etc. between all `FluentBundle` instances.
 
 The following is a high-level example of how this works, for running examples see
 the [docs](https://docs.rs/intl-memoizer/)