Call for projects: fix markdown (#2380)

Thanks @magicmark for the heads up 🙏

Author: martinbonnin

src/pages/blog/2026-03-12-call-for-projects.mdx

@@ -32,7 +32,7 @@ For example, these topics have been discussed recently in the community and woul
 
 * Implement alternative serialization format (CBOR, argo) in graphql-js.
 * Implement [semantic introspection](https://github.com/graphql/ai-wg/blob/main/rfcs/semantic-introspection.md) in graphql-js to make it easier for agents to discover GraphQL schemas and types.
-* Implement new experimental GraphQL features such as []`onError` or service capabilities](https://github.com/graphql/graphql-spec/pull/1163) in graphql-js.
+* Implement new experimental GraphQL features such as [`onError` or service capabilities](https://github.com/graphql/graphql-spec/pull/1163) in graphql-js.
 * Implement a type-safe query builder library using TypeScript.
 * Design and implement a "[caniuse.graphql.org](https://github.com/graphql/community-wg/issues/165)" website to make it easy to see at a glance what experimental features are supported in different frameworks.
 * Propose and implement an alternative way to thread in inputs to @skip/@include (highlighted as a problem [here](https://www.youtube.com/watch?t=498&v=Orgyp3xOqwY&feature=youtu.be)).