Doc: Ensure exactly one blank line after SameSite paragraph

Author: iqra-codes

Doc/library/http.cookies.rst

@@ -154,11 +154,12 @@ Morsel Objects
    requests and top-level navigations), and "None" (sent with same-site and
    cross-site requests). When using "None", the "secure" attribute must also
    be set, as required by modern browsers.
+   
    The attribute :attr:`partitioned` indicates to user agents that these
    cross-site cookies *should* only be available in the same top-level context
    that the cookie was first set in. For this to be accepted by the user agent,
    you **must** also set ``Secure``.
-
+   
    In addition, it is recommended to use the ``__Host`` prefix when setting
    partitioned cookies to make them bound to the hostname and not the
    registrable domain. Read