Removed an extra comma

The trailing comma is a compile time problem

docs/repo-docs/crafting-your-repository/creating-an-internal-package.mdx

@@ -62,7 +62,7 @@ Next, create the `package.json` for the package. By adding this file, you'll ful
  "./subtract": {
  "types": "./src/subtract.ts",
  "default": "./dist/subtract.js"
- },
+ }
  },
  "devDependencies": {
  "@repo/typescript-config": "*",