Explicitly cast the SOMA API response to an integer (#60071)

This resolves the `TypeError: unsupported operand type(s) for -: 'int'
and 'str'` error.

Fixes #60070.

Signed-off-by: Avi Miller <me@dje.li>

homeassistant/components/soma/cover.py

@@ -87,5 +87,5 @@ class SomaCover(SomaEntity, CoverEntity):
             )
             self.is_available = False
             return
-        self.current_position = 100 - response["position"]
+        self.current_position = 100 - int(response["position"])
         self.is_available = True