Bump version

Not sure at this stage whether there will be a 2026.5.4 release,
or straight to 2026.6.0, but since I have forgotten to bump this
recently, it is better to do it immediately after release.

custom_components/tuya_local/manifest.json

@@ -18,5 +18,5 @@
         "tinytuya==1.18.0",
         "tuya-device-sharing-sdk~=0.2.4"
     ],
-    "version": "2026.5.3"
+    "version": "2026.5.4"
 }