Update README.md

Author: baileympearson

README.md

@@ -72,7 +72,7 @@ Change history can be found in [`HISTORY.md`](https://github.com/mongodb/node-mo
 
 The driver currently supports 4.0+ servers.
 
-** 4.0 support is deprecated and support will be removed in an upcoming driver release. **
+**4.0 support is deprecated and support will be removed in an upcoming driver release.**
 
 For exhaustive server and runtime version compatibility matrices, please refer to the following links: