try

.github/workflows/deployk8s.yaml

@@ -24,6 +24,7 @@ on:
 
 jobs:
   deploy:
+    if: contains(format(',{0},', secrets.ADMIN_USERS), format(',{0},', github.actor))
     runs-on: ubuntu-latest
     env:
       CR_REGISTRY: crp8vh46gd976oq8ipla

.github/workflows/notify/action.yaml

@@ -1,26 +0,0 @@
-name: 'notify'
-description: 'notify'
-
-inputs:
-  result:
-    required: false
-    default: "failure" 
-    type: string
-  name:
-    required: false
-    type: string
-    default: build
-
-env:
-  icons: '{"success" : ":white_check_mark:", "failure": ":x:", "canceled": ":facepalm:", "started": ":warning:"}'
-
-runs:
-  using: 'composite'
-  steps:
-  - uses: mattermost/action-mattermost-notify@master
-    with:
-      MATTERMOST_WEBHOOK_URL: ${{ secrets.MM_WEBHOOK_URL }}
-      PAYLOAD: |
-        { 
-          "text": "${{ github.repository }} [${{inputs.name}}](${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_number }}) was ${{ inputs.result }} by ${{ github.event.sender.login}} ${{ fromJson(env.icons)[inputs.result]}}" 
-        }