Restore figaspect() API documentation

timhoffm · timhoffm · commit 82503fbf7b93 · 2023-10-14T15:55:24.000+02:00
This was accidentally lost through #26629.
diff --git a/doc/api/figure_api.rst b/doc/api/figure_api.rst
@@ -306,3 +306,8 @@ FigureBase parent class
 =======================
 
 .. autoclass:: FigureBase
+
+Helper functions
+================
+
+.. autofunction:: figaspect
