doc: update discord link (#79)

Author: fredbi

README.md

@@ -219,7 +219,7 @@ Maintainers can cut a new release by either:
 [slack-badge]: https://img.shields.io/badge/slack-blue?link=https%3A%2F%2Fgoswagger.slack.com%2Farchives%2FC04R30YM
 [slack-url]: https://goswagger.slack.com/archives/C04R30YMU
 [discord-badge]: https://img.shields.io/discord/1446918742398341256?logo=discord&label=discord&color=blue
-[discord-url]: https://discord.gg/twZ9BwT3
+[discord-url]: https://discord.gg/FfnFYaC3k5
 
 <!-- Badges: license & compliance -->
 [license-badge]: http://img.shields.io/badge/license-Apache%20v2-orange.svg

docs/doc-site/project/contributing/CONTRIBUTING.md

@@ -53,7 +53,7 @@ You may also join our discord server where you may discuss issues or requests.
 [![Discord Server][discord-badge]][discord-url]
 
 [discord-badge]: https://img.shields.io/discord/1446918742398341256?logo=discord&label=discord&color=blue
-[discord-url]: https://discord.gg/twZ9BwT3
+[discord-url]: https://discord.gg/FfnFYaC3k5
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