Upgraded samples for OAuth samples

[HariRangarajan-Solace]

• Check for expiration, audience, issuer claims to ensure token integrity.
• Implement logging and monitoring for all token-related activities.

[github-actions]

Hi there! 👋

Thanks for your PR. Please check if your the changes in this PR are referenced on https://tutorials.solace.dev/

If they are, please update:

1. The commit number in the gatsby-config.js file
2. Update the lines of code referenced in src/pages/tutorials/{language}/{tutorial.md} file in the embed:{Lang}-Samples/{path/to/file}#L{start_line}-{end_line} section

Review comments have been addressed