docs: Update README.md

[MonicaG]

Description

Removed the link to just-ask.developer.gov.bc.ca. Replaced with link to instructions on how to join the bcgov organization.

Fixes # (issue)

Type of change

Please delete options that are not relevant.

• 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)
• This change requires a documentation update

How Has This Been Tested?

No, it was just a change to the documentation (the README.md file).

Checklist

• I have read the CONTRIBUTING doc
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have already been accepted and merged

Further comments

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[Copilot]

Pull Request Overview

This PR updates the README.md file to replace the outdated link for joining the BCGov GitHub organization with a link to the current instructions.

• Updated the documentation link in the requirements list
• Removed reference to the deprecated Just Ask page

Comments suppressed due to low confidence (1)

README.md:72

• [nitpick] Consider using more descriptive link text to clearly indicate the purpose of the link, such as 'Join the BCGov organization using these instructions'.

* Join by [following these instructions](https://developer.gov.bc.ca/docs/default/component/bc-developer-guide/use-github-in-bcgov/bc-government-organizations-in-github/#directions-to-sign-up-and-link-your-account-for-bcgov).

[DerekRoberts]

Thank you for the correction! :)