docs: Update link to Slack channel (#867)

Author: terrytangyuan

README.md

@@ -110,7 +110,7 @@ Follow this [README](./test/e2e/epp/README.md) to learn more about running the i
 
 Our community meeting is weekly at Thursday 10AM PDT ([Zoom](https://zoom.us/j/9955436256?pwd=Z2FQWU1jeDZkVC9RRTN4TlZyZTBHZz09), [Meeting Notes](https://www.google.com/url?q=https://docs.google.com/document/d/1frfPE5L1sI3737rdQV04IcDGeOcGJj2ItjMg6z2SRH0/edit?usp%3Dsharing&sa=D&source=calendar&usd=2&usg=AOvVaw1pUVy7UN_2PMj8qJJcFm1U)).
 
-We currently utilize the [#wg-serving](https://kubernetes.slack.com/?redir=%2Fmessages%2Fwg-serving) slack channel for communications.
+We currently utilize the [#gateway-api-inference-extension](https://kubernetes.slack.com/?redir=%2Fmessages%2Fgateway-api-inference-extension) channel in Kubernetes Slack workspace for communications.
 
 Contributions are readily welcomed, follow the [dev guide](./docs/dev.md) to start contributing!