Add Potential Applications or Examples for goTLSScan

[wjkoh]

Thank you for the fantastic utility! I recently used goTLSScan to troubleshoot a tls: handshake failure issue with my net/http connection to a specific HTTPS server, and it worked exceptionally well. I have summarized my process in a gist, which you can find at https://gist.github.com/wjkoh/57b4f8191caa6f5ecadb846f91716626.

To help new users understand how to effectively use goTLSScan for their specific problems, I suggest adding some examples to the README.md file. This addition would provide valuable guidance and showcase the versatility of your tool in various scenarios.

Once again, thank you for developing this excellent utility!