fixed link name for `extends` tag

diff --git a/doc/tags/block.rst b/doc/tags/block.rst
index b02d89a..e380482 100644 (file)
--- a/doc/tags/block.rst
+++ b/doc/tags/block.rst
@@ -8,4 +8,4 @@ the same time. They are documented in detail in the documentation for the
 Block names should consist of alphanumeric characters, and underscores. Dashes
 are not permitted.
 
-.. seealso:: :doc:`block<../functions/block>`, :doc:`parent<../functions/parent>`, :doc:`use<../tags/use>`, :doc:`use<../tags/extends>`
+.. seealso:: :doc:`block<../functions/block>`, :doc:`parent<../functions/parent>`, :doc:`use<../tags/use>`, :doc:`extends<../tags/extends>`