slack removal (#793)

.github/ISSUE_TEMPLATE/config.yaml

@@ -1,4 +1,4 @@
 contact_links:
   - name: "\U0001F914 All other questions, including if you're not sure what to do."
-    url: https://posthog.com/slack
-    about: Search on our community Slack group for similar questions or ask for help there.
+    url: https://posthog.com/questions
+    about: Search on our community for similar questions or ask for help there.

charts/posthog/README.md

@@ -23,7 +23,7 @@ Security updates will continue until May 2024.
 [![Latest release of the Helm chart](https://img.shields.io/badge/dynamic/yaml.svg?label=Helm%20chart%20version&url=https://posthog.github.io/charts-clickhouse/index.yaml&query=$.entries.posthog[:1].version&logo=helm)](https://github.com/PostHog/charts-clickhouse)
 [![Latest release app version](https://img.shields.io/badge/dynamic/yaml.svg?label=App%20version&url=https://posthog.github.io/charts-clickhouse/index.yaml&query=$.entries.posthog[:1].appVersion)](https://github.com/PostHog/posthog)
 [![MIT License](https://img.shields.io/badge/License-MIT-red.svg?style=flat-square)](https://opensource.org/licenses/MIT)
-[![Slack](https://img.shields.io/badge/PostHog_chat-slack-blue?logo=slack)](https://posthog.com/slack)
+[![Community](https://img.shields.io/badge/PostHog_chat-slack-blue?logo=slack)](https://posthog.com/questions)
 
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