manifest: use only dash before version suffix

custom_components/tuya_local/manifest.json

@@ -18,5 +18,5 @@
         "git+https://github.com/jasonacox/tinytuya.git@v2.0.0-async",
         "tuya-device-sharing-sdk~=0.2.1"
     ],
-    "version": "2025.9.async-experimental"
+    "version": "2025.9.1-async-experimental"
 }