ci: use max Node.js version of 16.8

Node.js version 16.9 relesed 3 days ago gives cryptic
errors. We'll wait untill this is fixed upstream.

.github/workflows/nodejs.yml

@@ -18,7 +18,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [12.x, 14.x, 16.x]
+        node-version: [12.x, 14.x, 16.8]
 
     steps:
     - uses: actions/checkout@v2
@@ -39,7 +39,7 @@ jobs:
         path: cypress/cache
         key: cypress-binary-${{ hashFiles('package-lock.json') }}
     - name: Install dependencies
-      if: | 
+      if: |
         steps.cache-node-modules.outputs.cache-hit != 'true' ||
         steps.cache-cypress-binary.outputs.cache-hit != 'true'
       run: npm ci