Update channels.yaml

New channel request for kalm (https://kalm.dev/), the open source kubernetes management project

Author: swinges

communication/slack-config/channels.yaml

@@ -128,6 +128,7 @@ channels:
   - name: jp-users-novice
   - name: jsonnet
   - name: k14s
+  - name: kalm
   - name: kaniko
   - name: k8s-dual-stack
   - name: k8s-infra-alerts