gh-107924: re-order os.sendfile() flag documentation (#107926)

Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>

Author: calestyo

Doc/library/os.rst

@@ -1618,25 +1618,6 @@ or `the MSDN <https://msdn.microsoft.com/en-us/library/z0kc8e3z.aspx>`_ on Windo
       Parameters *out* and *in* was renamed to *out_fd* and *in_fd*.
 
 
-.. function:: set_blocking(fd, blocking, /)
-
-   Set the blocking mode of the specified file descriptor. Set the
-   :data:`O_NONBLOCK` flag if blocking is ``False``, clear the flag otherwise.
-
-   See also :func:`get_blocking` and :meth:`socket.socket.setblocking`.
-
-   .. availability:: Unix, Windows.
-
-      The function is limited on Emscripten and WASI, see
-      :ref:`wasm-availability` for more information.
-
-      On Windows, this function is limited to pipes.
-
-   .. versionadded:: 3.5
-
-   .. versionchanged:: 3.12
-      Added support for pipes on Windows.
-
 .. data:: SF_NODISKIO
           SF_MNOWAIT
           SF_SYNC
@@ -1658,6 +1639,26 @@ or `the MSDN <https://msdn.microsoft.com/en-us/library/z0kc8e3z.aspx>`_ on Windo
    .. versionadded:: 3.11
 
 
+.. function:: set_blocking(fd, blocking, /)
+
+   Set the blocking mode of the specified file descriptor. Set the
+   :data:`O_NONBLOCK` flag if blocking is ``False``, clear the flag otherwise.
+
+   See also :func:`get_blocking` and :meth:`socket.socket.setblocking`.
+
+   .. availability:: Unix, Windows.
+
+      The function is limited on Emscripten and WASI, see
+      :ref:`wasm-availability` for more information.
+
+      On Windows, this function is limited to pipes.
+
+   .. versionadded:: 3.5
+
+   .. versionchanged:: 3.12
+      Added support for pipes on Windows.
+
+
 .. function:: splice(src, dst, count, offset_src=None, offset_dst=None)
 
    Transfer *count* bytes from file descriptor *src*, starting from offset