fix length of title underscores in README.rst

sbillinge · sbillinge · commit 868a09d12857 · 2024-06-27T15:09:32.000-04:00
diff --git a/README.rst b/README.rst
@@ -1,5 +1,5 @@
 |Icon| `diffpy.pdfmorph <https://diffpy.github.io/diffpy.pdfmorph>`_
-=========================================================
+====================================================================
 
 .. |Icon| image:: https://avatars.githubusercontent.com/diffpy
         :target: https://diffpy.github.io/diffpy.pdfmorph
