minor #8287 Fixed typo (nicoschoenmaker)

This PR was submitted for the master branch but it was merged into the 3.3 branch instead (closes #8287).

Discussion
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Fixed typo

concreate -> concrete.

Commits
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c6311c0 Fixed typo

Author: xabbuh

service_container/autowiring.rst

@@ -268,7 +268,7 @@ Working with Interfaces
 -----------------------
 
 You might also find yourself type-hinting abstractions (e.g. interfaces) instead
-of concreate classes as it makes it easy to replace your dependencies with other
+of concrete classes as it makes it easy to replace your dependencies with other
 objects.
 
 To follow this best practice, suppose you decide to create a ``TransformerInterface``::