Merge pull request #3928 from adamdmharvey/doco-chore

chore(docs): Update docs publishing process

.github/workflows/microsite-build-check.yml

@@ -13,7 +13,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [12.x, 14.x]
+        node-version: [14.x]
 
     env:
       CI: true

.github/workflows/microsite-with-storybook-deploy.yml

@@ -17,7 +17,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [12.x]
+        node-version: [14.x]
 
     env:
       CI: true
@@ -55,7 +55,7 @@ jobs:
         run: ls microsite/build/backstage && ls microsite/build/backstage/storybook
 
       - name: Deploy both microsite and storybook to gh-pages
-        uses: JamesIves/github-pages-deploy-action@3.4.2
+        uses: JamesIves/github-pages-deploy-action@3.7.1
         with:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           BRANCH: gh-pages