Auto merge of #7529 - giraffate:update_node_version, r=llogiq

Use node v12.x in CI

In #7528 (comment), remark-cli version has been updated recently and it requires to use ESM module: https://github.com/remarkjs/remark/releases/tag/14.0.0. Node version in CI was v10.24.1, it seems to be old.

changelog: none

Author: bors

.github/workflows/remark.yml

@@ -20,6 +20,8 @@ jobs:
 
     - name: Setup Node.js
       uses: actions/[email protected]
+      with:
+        node-version: '12.x'
 
     - name: Install remark
       run: npm install remark-cli remark-lint remark-lint-maximum-line-length remark-preset-lint-recommended remark-gfm