ci: update Node.js from version 14 to version 16

Node.js 14 is not maintained anymore, so we can drop support for it.

.github/workflows/linux.yml

@@ -182,7 +182,7 @@ jobs:
       - name: Install Node.js
         uses: actions/setup-node@v3
         with:
-          node-version: '14'
+          node-version: '16'
       - name: Install wasmtime
         run: |
           mkdir -p $HOME/.wasmtime $HOME/.wasmtime/bin