Update slack channel

Author: satterly

.github/workflows/docker.yml

@@ -15,7 +15,7 @@ jobs:
       - uses: act10ns/slack@v1
         with:
           status: starting
-          channel: '#workflows'
+          channel: '#actions'
         if: always()
       - name: Checkout
         uses: actions/checkout@v2
@@ -42,5 +42,5 @@ jobs:
         with:
           status: ${{ job.status }}
           steps: ${{ toJson(steps) }}
-          channel: '#workflows'
+          channel: '#actions'
         if: always()