New slack channel for Inspektor Gadget

Inspektor Gadget (https://github.com/kinvolk/inspektor-gadget) contains
a collection of gadgets for developers of Kubernetes applications. Its
main gadget, traceloop, uses BPF to record system calls performed by
each pod like a flight recorder. It can be used to see the last system
calls performed by a pod after it crashed.

It is available under the Apache license.

It is built on top of BCC (https://github.com/iovisor/bcc) and traceloop
(https://github.com/kinvolk/traceloop).

communication/slack-config/channels.yaml

@@ -97,6 +97,7 @@ channels:
   - name: in-events
   - name: in-users
   - name: ingress-nginx
+  - name: inspektor-gadget
   - name: it-events
   - name: it-users
   - name: java