build(ci): let's drop Node v14 for Test CI workflow

Our minimal Node version support is v16. v14 was added for no reasons
but now we have more workflows to run, let's remove unnecessary one.

.github/workflows/test.yml

@@ -18,7 +18,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node: ['14', '16', '18']
+        node: ['16', '18']
     steps:
       - name: Checkout code
         uses: actions/checkout@v3