Broken link in README to make-cast example

[edmundedgar]

What is the bug?

The README for write-data and contract-signatures links to an example called make-cast that doesn't exist

How can it be reproduced? (optional)
Include steps, code samples, replits, screenshots and anything else that would be helpful to reproduce the problem.

See READMEs at

hub-monorepo/packages/hub-nodejs/examples/write-data/README.md

Line 13 in 8f4e8e4

1. Clone the repo locally

and

hub-monorepo/packages/hub-nodejs/examples/contract-signatures/README.md

Line 14 in 8f4e8e4

2. Navigate to this folder with `cd packages/hub-nodejs/examples/make-cast`

Additional context (optional)