minor #12625 Update configuration.rst (noniagriconomie)

This PR was submitted for the master branch but it was merged into the 4.3 branch instead (closes #12625).

Discussion
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Update configuration.rst

Small fix

Commits
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a464664 Update configuration.rst

Author: OskarStark

configuration.rst

@@ -321,7 +321,7 @@ a new ``locale`` parameter is added to the ``config/services.yaml`` file).
 .. seealso::
 
     Later in this article you can read how to
-    ref:`get configuration parameters in controllers and services <configuration-accessing-parameters>`.
+    :ref:`get configuration parameters in controllers and services <configuration-accessing-parameters>`.
 
 .. index::
    single: Environments; Introduction