chore: avoid an unwanted mdx major bump (#16977)

Author: ocavue

packages/integrations/mdx/package.json

@@ -50,7 +50,7 @@
     "vfile": "^6.0.3"
   },
   "peerDependencies": {
-    "@astrojs/markdown-satteri": "workspace:*",
+    "@astrojs/markdown-satteri": "0.3.0",
     "astro": "^6.4.0"
   },
   "peerDependenciesMeta": {