ci: fix besu asset exchange workflow to use node 16

Signed-off-by: Sandeep Nishad <sandeep.nishad1@ibm.com>

.github/workflows/test_asset-exchange-besu.yml

@@ -36,10 +36,10 @@ jobs:
           java-version: '11'
           distribution: 'adopt'
 
-      - name: Use Node.js 14.x
-        uses: actions/setup-node@v2
+      - name: Use Node.js 16.x
+        uses: actions/setup-node@v4.0.2
         with:
-          node-version: 14.x
+          node-version: 16.x
 
       - name: Use Protoc 3.15
         run: |
@@ -215,10 +215,10 @@ jobs:
           java-version: '11'
           distribution: 'adopt'
 
-      - name: Use Node.js 14.x
-        uses: actions/setup-node@v2
+      - name: Use Node.js 16.x
+        uses: actions/setup-node@v4.0.2
         with:
-          node-version: 14.x
+          node-version: 16.x
 
       - name: Use Protoc 3.15
         run: |