ci(workspace): edit pnpm audit workflow to scan dependencies

Follow the current style of configuring CI jobs as requested by reviewers:

- Use matrix strategy for Node.js versions for ease of maintenance
- Match the exact same style as reference pr-builder.yml workflow

Addresses reviewer feedback: "Lets follow the current style of configuring CI jobs.
We usually keep a matrix of the versions such as Node.js for ease."

Author: TharakaUJ

.github/workflows/npm-audit.yml

@@ -1,6 +1,6 @@
 # -------------------------------------------------------------------------------------
 #
-# Copyright (c) 2024, WSO2 LLC. (https://www.wso2.com).
+# Copyright (c) 2025, WSO2 LLC. (https://www.wso2.com).
 #
 # WSO2 LLC. licenses this file to you under the Apache License,
 # Version 2.0 (the "License"); you may not use this file except
@@ -20,39 +20,42 @@
 
 # This workflow will perform a security audit on the codebase.
 
-name: Security Audit
+name: 🛡️ Security Audit
 
 on:
   pull_request:
-    branches: [ main ]
+    branches: [main]
+  workflow_dispatch:
 
 jobs:
   audit:
+    name: 🛡️ Security Audit
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [lts/*]
     steps:
-      - name: Checkout code
-        uses: actions/checkout@v4
+      - name: ⬇️ Checkout
+        id: checkout
+        uses: actions/[email protected]
 
-      - name: Setup Node.js
-        uses: actions/setup-node@v4
+      - name: 🟢 Setup node
+        id: setup-node
+        uses: actions/setup-node@v2
         with:
-          node-version: 18
+          node-version: ${{ matrix.node-version }}
 
-      - name: Install pnpm
-        uses: pnpm/action-setup@v4
+      - name: 🥡 Setup pnpm
+        id: setup-pnpm
+        uses: pnpm/[email protected]
         with:
-          version: 9
+          version: latest
+          run_install: false
 
-      - name: Install dependencies
+      - name: 🧩 Install Dependencies
+        id: install-dependencies
         run: pnpm install
 
-      - name: Run audit
-        run: |
-          pnpm audit --json > audit-results.json || true
-          pnpm audit --audit-level=high
-
-      - name: Upload audit results
-        uses: actions/upload-artifact@v4
-        with:
-          name: pnpm-audit-report
-          path: audit-results.json
+      - name: 🧩 Run Security Audit
+        id: run-security-audit
+        run: pnpm audit --audit-level=high