fix duplicate target name enabling_internationalisation

docs/advanced_topics/i18n.rst

@@ -101,7 +101,7 @@ The locales that are enabled on a site are recorded in the ``Locale`` model in
 stores the `BCP-47 language tag <https://en.wikipedia.org/wiki/IETF_language_tag>`_
 that represents this locale.
 
-The locale records can be set up with an :ref:`optional management UI <enabling_internationalisation>` or created
+The locale records can be set up with an :ref:`optional management UI <enabling_locale_management>` or created
 in the shell. The possible values of the ``language_code`` field are controlled
 by the ``WAGTAIL_CONTENT_LANGUAGES`` setting.
 
@@ -202,7 +202,7 @@ locales will use the "French" language tree. The differences between each locale
 in a language would be programmatic. For example: which date/number format to
 use, and what currency to display prices in.
 
-.. _enabling_internationalisation:
+.. _enabling_locale_management:
 
 Enabling the locale management UI (optional)
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^