Use admonitions in several pages

[bjohansebas]

There were several places where the use of admonitions is still not applied; this greatly improves the guidance in the documentation.

[netlify]

✅ Deploy Preview for expressjscom-preview ready!

Name	Link
🔨 Latest commit	7e4855d
🔍 Latest deploy log	https://app.netlify.com/sites/expressjscom-preview/deploys/6701a735cdfe710008dce3ed
😎 Deploy Preview	https://deploy-preview-1595--expressjscom-preview.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[carlosstenzel]

The action (check-translation) is failing due to your repository permission not allowing writing, as discussed in other PRs

[carlosstenzel]

Add manually to test if the action works

'{"labels":["requires-translation-es","requires-translation-fr","requires-translation-it","requires-translation-ja","requires-translation-ko","requires-translation-pt-br","requires-translation-ru","requires-translation-sk","requires-translation-zh-cn","requires-translation-zh-tw"]}',

[bjohansebas]

The action (check-translation) is failing due to your repository permission not allowing writing, as discussed in other PRs

The permissions of my repository don't affect anything in the PRs; the rules in this repository do. That's why in this PR (#1588) it works fine, because @crandmck was the one who opened it.

[crandmck]

Please resolve the merge conflicts and we can land this, thanks!

[bjohansebas]

@crandmck done