revert: drop huly-mcp pin back to 0.43.0 for publish workflow

The publish workflow only releases when package.json pins an older
@firfi/huly-mcp than npm latest. The prior commit pinned 0.44.3 directly,
which makes the workflow treat it as current and skip the 0.12 release.
Keep the native tool-mode fix (already on main) but roll the dependency
back to 0.43.0 so the workflow detects 0.43.0 -> 0.44.3, bumps to 0.12.0,
runs check (passing now with the native fix), and publishes.

Author: RealHeart

package.json

@@ -46,7 +46,7 @@
   },
   "license": "MIT",
   "dependencies": {
-    "@firfi/huly-mcp": "0.44.3",
+    "@firfi/huly-mcp": "0.43.0",
     "commander": "15.0.0"
   },
   "devDependencies": {