fix 3 additional broken slack links (#902)

Author: jansenpa

CONTRIBUTING.md

@@ -32,7 +32,7 @@ One of the tenets of the Tuva Project is sharing healthcare data knowledge, and
 
 ### Share your knowledge
 
-Another great way to contribute is to join our growing community of healthcare data practitioners in [Slack](https://join.slack.com/t/thetuvaproject/shared_invite/zt-16iz61187-G522Mc2WGA2mHF57e0il0Q)! Here, we are trying to foster an open environment where we can share ideas and collaborate.
+Another great way to contribute is to join our growing community of healthcare data practitioners in [Slack](https://join.slack.com/t/thetuvaproject/shared_invite/zt-35lhyb3as-moCo~~7A3el1oG1vSyIPHQ)! Here, we are trying to foster an open environment where we can share ideas and collaborate.
 
 ### Use the Tuva Project
 

README.md

@@ -43,5 +43,5 @@ Check out our Contribution guide [here](./CONTRIBUTING.md).
 <br/><br/>
 
 ## 🤝 Community
-Join our growing community of healthcare data people in [Slack](https://join.slack.com/t/thetuvaproject/shared_invite/zt-16iz61187-G522Mc2WGA2mHF57e0il0Q)!
+Join our growing community of healthcare data people in [Slack](https://join.slack.com/t/thetuvaproject/shared_invite/zt-35lhyb3as-moCo~~7A3el1oG1vSyIPHQ)!
 <br/><br/>

integration_tests/docs_generate/docs/overview.md

@@ -9,7 +9,7 @@ We're writing the open book on how to transform and analyze healthcare data.
 ### 🖥️ [Code](https://github.com/tuva-health)
 We're translating knowledge into precise code that anyone can run on their healthcare data.
 
-### 🤝 [Community](https://join.slack.com/t/thetuvaproject/shared_invite/zt-16iz61187-G522Mc2WGA2mHF57e0il0Q)
+### 🤝 [Community](https://join.slack.com/t/thetuvaproject/shared_invite/zt-35lhyb3as-moCo~~7A3el1oG1vSyIPHQ)
 We're building a community we're healthcare data people can ask questions and share knowledge about healthcare data.
 
 {% enddocs %}