Fix typo

doc/05-repositories.md

@@ -264,7 +264,7 @@ package, you should do so in the default (often master) branch and not in a
 feature branch, since the package name is taken from the default branch.
 
 Also note that the override will not work if you change the `name` property
-in your forked repository's composer.json file as this needs to match the
+in your forked repository's `composer.json` file as this needs to match the
 original for the override to work.
 
 If other dependencies rely on the package you forked, it is possible to