Bump msmart-ng to 2026.7.0 (#433)

Author: mill1000

custom_components/midea_ac/manifest.json

@@ -13,7 +13,7 @@
     "msmart"
   ],
   "requirements": [
-    "msmart-ng==2026.4.1",
+    "msmart-ng==2026.7.0",
     "pyyaml"
   ],
   "version": "2026.4.0"