Preparing for release, 3.0.0.

Author: dblock

CHANGELOG.md

@@ -1,10 +1,9 @@
-### 3.0.0 (Next)
+### 3.0.0 (2025/09/22)
 
 * [#573](https://github.com/slack-ruby/slack-ruby-client/pull/573): Removed support for RTM APIs - [@dblock](https://github.com/dblock).
 * [#568](https://github.com/slack-ruby/slack-ruby-client/pull/568): Redact Authorization header in response stored in the error - [@levenleven](https://github.com/levenleven).
 * [#558](https://github.com/slack-ruby/slack-ruby-client/pull/558): Update API from [slack-api-ref@c408935](https://github.com/slack-ruby/slack-api-ref/commit/c408935) - [@slack-ruby-ci-bot](https://github.com/apps/slack-ruby-ci-bot).
 * [#571](https://github.com/slack-ruby/slack-ruby-client/pull/571): Update API from [slack-api-ref@e1a2c4d](https://github.com/slack-ruby/slack-api-ref/commit/e1a2c4d) - [@slack-ruby-ci-bot](https://github.com/apps/slack-ruby-ci-bot).
-* Your contribution here.
 
 ### 2.7.0 (2025/07/20)
 

README.md

@@ -70,7 +70,7 @@ A Ruby client for the Slack [Web](https://api.slack.com/web) and [Events](https:
 
 ## Stable Release
 
-You're reading the documentation for the **next** release of slack-ruby-client. Please see the documentation for the [last stable release, v2.7.0](https://github.com/slack-ruby/slack-ruby-client/blob/v2.7.0/README.md) unless you're integrating with HEAD. See [UPGRADING](UPGRADING.md) when upgrading from an older version.
+You're reading the documentation for the **stable** release of slack-ruby-client, v3.0.0. See [UPGRADING](UPGRADING.md) when upgrading from an older version.
 
 ## Installation