ref machine.SDCard : Fix positional / kw args

Signed-off-by: Jos Verlinde <Jos.Verlinde@microsoft.com>

Author: Josverl

reference/micropython/machine/SDCard.pyi

@@ -105,14 +105,14 @@ class SDCard(AbstractBlockDev):
         self,
         slot: int = 1,
         width: int = 1,
+        *,
         cd: PinLike | None = None,
         wp: PinLike | None = None,
         sck: PinLike | None = None,
         miso: PinLike | None = None,
         mosi: PinLike | None = None,
         cs: PinLike | None = None,
         freq: int = 20000000,
-        /,
     ) -> None:
         """
         This class provides access to SD or MMC storage cards using either