fix: use @devhaven/unit-conversion dependency from npm

Author: BlankRiser

apps/docs/package.json

@@ -11,7 +11,7 @@
   },
   "dependencies": {
     "@astrojs/starlight": "^0.35.2",
-    "@devhaven/unit-conversion": "workspace:*",
+    "@devhaven/unit-conversion": "0.1.0",
     "astro": "^5.6.1",
     "expressive-code-twoslash": "0.5.3",
     "sharp": "^0.34.2",