infra: Don't run CI on dependabot PRs - #4244

Changed pages include:

• index.html - view
• 404.html - view
• book/index.html - view
• guides/index.html - view
• installation/index.html - view
• reference/index.html - view
• search/index.html - view
• book/01-getting-started/index.html - view
• book/02-concepts/index.html - view
• book/03-packages/index.html - view

There are more changes not included in the list