[docs] fix a Sphinx directive in `c-api/object.rst` (#121430)

diff --git a/Doc/c-api/object.rst b/Doc/c-api/object.rst
index 8eeac3fc8a1e587c15fc1052b9d5d9587a0c027c..2103a64d8ffbb78ca173bee20f04fb16064ccd64 100644 (file)
--- a/Doc/c-api/object.rst
+++ b/Doc/c-api/object.rst
@@ -52,6 +52,7 @@ Object Protocol
 
    The reference is borrowed from the interpreter, and is valid until the
    interpreter finalization.
+
    .. versionadded:: 3.13