Update workflow dispatch

Author: caroline-ttd

.github/workflows/vulnerability-scan-failure-notify.yaml

@@ -2,6 +2,16 @@ name: Vulnerability Scan Failure Slack Notify
 on:
   push: # todo: will remove before merging
   workflow_dispatch:
+    inputs:
+      vulnerability_severity:
+        description: The severity to fail the workflow if such vulnerability is detected. DO NOT override it unless a Jira ticket is raised. DO NOT use 'CRITICAL' unless a Jira ticket is raised.
+        type: choice
+        options:
+          - CRITICAL,HIGH
+          - CRITICAL,HIGH,MEDIUM
+          - CRITICAL
+        default:
+          'CRITICAL,HIGH'
   schedule:
     - cron: '0 16 * * *'  # 9:00 AM GMT -7
     - cron: '0 0 * * *'   # 5:00 PM GMT -7
@@ -13,4 +23,4 @@ jobs:
       SLACK_WEBHOOK : ${{ secrets.SLACK_WEBHOOK }}
     with:
       scan_type : image
-      java_version: "21"
+      java_version: "21"