feat: add rubyconf 2024 (#1087)

README.md

@@ -607,6 +607,7 @@ All the data (past and coming) are available publicly in JSON:
 * 13-14: [OpenForum Academy Symposium](https://symposium.openforumeurope.org/) - Boston, MA (USA) <a href="https://symposium.openforumeurope.org/openforum-academy-symposium/"><img alt="CFP OFA Symposium 2024" src="https://img.shields.io/static/v1?label=CFP&message=until%2007-August-2024&color=green"></a>
 * 13-15: [Build Stuff 2024 Lithuania](http://buildstuff.events) - Vilnius (Lithuania) <a href="https://sessionize.com/build-stuff-2024/"><img alt="CFP Build Stuff 2024 Lithuania" src="https://img.shields.io/static/v1?label=CFP&message=until%2020-June-2024&color=red"></a>
 * 13-15: [Ekoparty Security Conference 2024](https://www.ekoparty.org) - Buenos Aires (Argentina) <a href="https://sessionize.com/ekoparty-security-conference-2024/"><img alt="CFP Ekoparty Security Conference 2024" src="https://img.shields.io/static/v1?label=CFP&message=until%2031-August-2024&color=green"></a>
+* 13-15: [RubyConf 2024](https://rubyconf.org) - Chicago, IL (USA)
 * 14: [Conf24 Prompt Engineering](https://www.conf42.com/prompt2024) - Online <a href="https://www.papercall.io/conf42-prompt-engineering-2024"><img alt="CFP Conf42 Prompt" src="https://img.shields.io/static/v1?label=CFP&message=until%2014-Oct-2024&color=green"></a>
 * 14: [Kotlin Dev Day](https://kotlindevday.com/) - Amsterdam (Netherlands)
 * 14-15: [DevOps Barcelona](https://devops.barcelona/) - Barcelona (Spain) <a href="https://devops.barcelona/call-for-papers"><img alt="CFP DevOps Barcelona" src="https://img.shields.io/static/v1?label=CFP&message=until%2030-June-2024&color=red"></a>