Fix: #AR-7436 JWT Token fix for mobile Auth SDK

[shaloo]

Pull Request Template

Resolves or continues AR-7436.

Blocking dependencies

NA

Changes

JWT Token info added in Flutter and React-Native Guides:

See 'Onboarding tab content'

1. https://deploy-preview-80--arcana-docs.netlify.app/quick-start/flutter-quick-start#step-3-integrate-app
2. https://deploy-preview-80--arcana-docs.netlify.app/quick-start/react-native-quick-start#step-3-integrate-arcana-auth-react-native-sdk

When making primarily visual changes, it's helpful to include before and after screenshots.

Checklist

• The branch name follows the format: developer/AR-XXX-issue-name.
• The changes have been tested locally.

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[shaloo]

@mmjee you green ticked the PR note on slack so assuming this is good to go. merging. Thx.
cc: @anivenu