Update README.md

[tkacheva]

Description

Update readme with additional resources under Useful Links

Related Issue

Closes #PWA-3027.

Acceptance

Verification Stakeholders

Specification

Verification Steps

Test scenario(s) for direct fix/feature

Test scenario(s) for any existing impacted features/areas

Test scenario(s) for any Magento Backend Supported Configurations

Is Browser/Device testing needed?

Any ad-hoc/edge case scenarios that need to be considered?

Screenshots / Screen Captures (if appropriate)

Breaking Changes (if any)

Checklist

• I have added tests to cover my changes, if necessary.
• I have added translations for new strings, if necessary.
• I have updated the documentation accordingly, if necessary.

[pwa-studio-bot]

	Messages
📖	Associated JIRA tickets: PWA-3027.
📖	DangerCI Failures related to missing labels/description/linked issues/etc will persist until the next push or next pr-test build run (assuming they are fixed).
📖	Access a deployed version of this PR here. Make sure to wait for the "pwa-pull-request-deploy" job to complete.

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