ci: fix publishing (#11269)

The drop of node 12 means we also need to update the version of node we
use when we publish as 12 would cause the check to fail.

Signed-off-by: vince-fugnitto <vincent.fugnitto@ericsson.com>

.github/workflows/ci-cd.yml

@@ -117,10 +117,10 @@ jobs:
         with:
           fetch-depth: 0 # To fetch all history for all branches and tags. (Will be required for caching with lerna: https://github.com/markuplint/markuplint/pull/111)
 
-      - name: Use Node.js 12.x
+      - name: Use Node.js 14.x
         uses: actions/setup-node@v1
         with:
-          node-version: '12.x'
+          node-version: '14.x'
           registry-url: 'https://registry.npmjs.org'
 
       - name: Use Python 3.x