2.19.1 - Added Amazon Search & Product Documentation

What's Changed

• Move walmart docs into its own sub sections by @ziming in #13
• fix documentation on config file by @ziming in #14
• changing wordings on testing section by @ziming in #15
• Add initial documentation on amazon search scrapingbee client by @ziming in #16
• add docs on amazon product scrapingbee client by @ziming in #17
• Bump stefanzweifel/git-auto-commit-action from 6 to 7 by @dependabot[bot] in #18

Full Changelog: 2.19...2.19.1