Update actions/setup-node action to v4

Update actions/setup-node from 2 to 4

Change-type: patch

Author: balena-renovate[bot]

.github/workflows/publish-docs.yml

@@ -21,7 +21,7 @@ jobs:
           persist-credentials: false
 
       - name: Setup node
-        uses: actions/setup-node@7c12f8017d5436eb855f1ed4399f037a36fbd9e8 # v2
+        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
         with:
           node-version: "14"