🔒 Pin GitHub Actions to commit SHAs (#3308)
* 🔒 pin _e2e_tests.yml actions to commit SHAs
* 🔒 pin cd.yml actions to commit SHAs
* 🔒 pin doc-build.yml actions to commit SHAs
* 🔒 pin doc-pr-build.yml actions to commit SHAs
* 🔒 pin doc-pr-upload.yml actions to commit SHAs
* 🔒 pin trufflehog.yml actions to commit SHAs
