docs: update publishing dashboard links

[suyua9]

Description

• update the Chrome developer dashboard link in publishing docs to the current dashboard path
• switch the Firefox marketplace link to its canonical HTTPS URL

Changelog

CHANGELOG entry: null

Related issues

Fixes:

Manual testing steps

1. Open docs/publishing.md
2. Confirm the Chrome dashboard link points to https://chrome.google.com/webstore/devconsole/
3. Confirm the Firefox marketplace link points to the canonical HTTPS URL

Screenshots/Recordings

Before

• Not included (documentation-only URL cleanup)

After

• Not included (documentation-only URL cleanup)

Pre-merge author checklist

• I've followed MetaMask Contributor Docs and MetaMask Extension Coding Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[github-actions]

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[suyua9]

I have read the CLA Document and I hereby sign the CLA