Update chainjs.md

[mblinder]

Updated timeline

Project Abstract

Please provide a brief description of your project here summarising key points (1-2 paragraphs).

If your application is a follow-up to a previous grant, please mention which one in the first line of the abstract and include a link to previous pull requests if applicable.

For which grant level are you applying?

• Level 1: Up to $10,000, 2 approvals
• Level 2: Up to $50,000, 3 approvals
• Level 3: Unlimited, 5 approvals (for > $100k Web3 Foundation Council approval)

Application Checklist

• The application template has been copied, renamed ( project_name.md) and updated.
• A BTC or Ethereum (DAI/USDT) address for the payment of the milestones is provided inside the application.
• I have read and acknowledged the terms and conditions.
• The software delivered for this grant will be released under an open-source license specified in the application.
• The initial PR contains only one commit (squash and force-push if needed).
• The grant will only be announced once the first milestone has been accepted.

[semuelle]

Refers to #228 (comment)