Fix typedefs link in FCL README

[Eudes-Crabe]

Summary

Fixes the broken typedefs link in packages/fcl/README.md by replacing the relative package link with a stable GitHub URL to the typedefs source file.

The previous link points to ../typedefs/src/index.ts, which can break when the package README is rendered outside the monorepo context. The new link resolves directly to the source file in this repository.

Related issue

Fixes #2235

Testing

git diff --check -- packages/fcl/README.md

Manual verification: confirmed packages/typedefs/src/index.ts exists in the repository and the new URL targets that file.

[vercel]

@Eudes-Crabe is attempting to deploy a commit to the Flow Team on Vercel.

A member of the Team first needs to authorize it.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 7d7c0fc

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR