fix(docs): update readme to mention Framna

[SMillerDev]

Use Framna references in the README

Description

Now that we're Framna 🥳, this repo can reflect it too.

Motivation and Context

It's not really required, but it was the last reference to Shape in the README

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

[Copilot]

Pull Request Overview

This PR updates the README file to reflect the new branding as Framna, replacing older Shape references.

• Updated branding and URLs from Shape to Framna
• Revised the company link and careers link to the new Framna URLs

Comments suppressed due to low confidence (1)

README.md:89

• Ensure that all branding references are updated consistently across the document. Double-check that the new links and company name align with the intended branding.

Framna Docs is built with ❤️ by [Framna](https://framna.com/) in Denmark. Oh, and [we are hiring](https://framna.com/careers) 🤗

[simonbs]

🚀🫶