DOC: Add missing "footer_center" in layout overview diagram (pydata#1640)

jorisvandenbossche · ivanov · commit aa5bcae18f34 · 2024-06-04T11:16:04.000-07:00
diff --git a/docs/user_guide/layout.rst b/docs/user_guide/layout.rst
@@ -170,6 +170,7 @@ For  complete reference of the existing option please see :ref:`the last section
             Footer
 
         ``footer_start``
+        ``footer_center``
         ``footer_end``
 
 Horizontal spacing
