Added - https://github.com/tejzpr/webex-go-sdk

[tejzpr]

Please check that what you want to add to awesome-webex meets these Quality standards before sending pull requests. Thanks!

Have you checked the boxes below before submitting your PR:

• [✓] I have added my resource in alphabetical order
• [✓] I know that this resource was not listed before
• [✓] I have added a link to the source code repo (except for documentation, articles etc.)
• [✓] I have checked my resource is properly documented
• [✓] I have added a synthetic description of my resource
• [✓] I have read the Contribution guidelines and Quality standards.

Note: that new sections can be added only when there are three resources or more.

Thanks for your PR, you're awesome! 👍