Updated slack configuration to secrets

Author: mkimberlin

.github/workflows/gradle-build-poc.yml

@@ -117,10 +117,10 @@ jobs:
             --set-secrets "SERVICE_ACCOUNT_CREDENTIALS=SERVICE_ACCOUNT_CREDENTIALS:latest" \
             --set-secrets "WEB_ADDRESS=CLOUD_RUN_ADDRESS:latest" \
             --set-secrets "MICRONAUT_ENVIRONMENTS=MICRONAUT_ENVIRONMENTS:latest" \
-            --set-env-vars "SLACK_WEBHOOK_URL=${{ secrets.SLACK_WEBHOOK_URL }}" \
-            --set-env-vars "SLACK_BOT_TOKEN=${{ secrets.SLACK_BOT_TOKEN }}" \
-            --set-env-vars "SLACK_SIGNING_SECRET=${{ secrets.SLACK_PULSE_SIGNING_SECRET }}" \
-            --set-env-vars "SLACK_KUDOS_CHANNEL_ID=${{ secrets.SLACK_KUDOS_CHANNEL_ID }}" \
+            --set-secrets "SLACK_WEBHOOK_URL=SLACK_WEBHOOK_URL:latest" \
+            --set-secrets "SLACK_BOT_TOKEN=SLACK_BOT_TOKEN:latest" \
+            --set-secrets "SLACK_SIGNING_SECRET=SLACK_SIGNING_SECRET:latest" \
+            --set-secrets "SLACK_KUDOS_CHANNEL_ID=SLACK_KUDOS_CHANNEL_ID:latest" \
             --platform "managed" \
             --max-instances 2 \
             --allow-unauthenticated