Fixing typo per @mbontemps

Author: weaverryan

glossary.rst

@@ -81,7 +81,7 @@ Glossary
 
  Acme
  *Acme* is a sample company name used in Symfony demos and documentation.
- Ut's used as a namespace where you would normally use your own company's
+ It's used as a namespace where you would normally use your own company's
  name (e.g. ``Acme\BlogBundle``).
 
  Action