fix: correct duplicate 'starter/' in repository URLs (#1269)

### Description

Remove duplicate 'starter/' path segment in deployUrl and
create-next-app command examples

### Type of Change

- [ ] New Example
- [x] Example updates (Bug fixes, new features, etc.)
- [ ] Other (changes to the codebase, but not to examples)

Co-authored-by: Claude <[email protected]>
Co-authored-by: Lorenzo Palmes <[email protected]>

Author: 3 people

starter/cms-sanity-graphql-fragments/README.md

@@ -5,7 +5,7 @@ description: A Next.js blog powered by Sanity CMS and GraphQL with ISR, featurin
 framework: Next.js
 useCase: CMS
 css: Tailwind
-deployUrl: https://vercel.com/new/git/external?repository-url=https://github.com/vercel/examples/tree/main/starter/starter/cms-sanity-graphql-fragments&project-name=cms-sanity-graphql-fragments&repository-name=cms-sanity-graphql-fragments
+deployUrl: https://vercel.com/new/git/external?repository-url=https://github.com/vercel/examples/tree/main/starter/cms-sanity-graphql-fragments&project-name=cms-sanity-graphql-fragments&repository-name=cms-sanity-graphql-fragments
 demoUrl: https://cms-graphql-fragments.vercel.app/
 ignoreE2E: true
 ---
@@ -31,7 +31,7 @@ Deploy the example using [Vercel](https://vercel.com?utm_source=github&utm_mediu
 Execute [`create-next-app`](https://github.com/vercel/next.js/tree/canary/packages/create-next-app) with [npm](https://docs.npmjs.com/cli/init) or [Yarn](https://yarnpkg.com/lang/en/docs/cli/create/) to bootstrap the example:
 
 ```bash
-pnpm create next-app --example https://github.com/vercel/examples/tree/main/starter/starter/cms-sanity-graphql-fragments
+pnpm create next-app --example https://github.com/vercel/examples/tree/main/starter/cms-sanity-graphql-fragments
 ```
 
 Next, run Next.js in development mode: