Update repo and homepage URLs (move to Gitea)

package.json

@@ -16,6 +16,7 @@
   "license": "MIT",
   "repository": {
     "type": "git",
-    "url": "https://github.com/67P/kosmos-schemas.git"
-  }
+    "url": "https://gitea.kosmos.org/kosmos/schemas.git"
+  },
+  "homepage": "https://gitea.kosmos.org/kosmos/schemas"
 }