Say that creating a Starter organization takes a work email address - #4198

Changed pages include:

• chainguard/checks/index.html - view
• chainguard/workspaces/index.html - view
• chainguard/checks/chainctl-checks-reference/index.html - view
• chainguard/checks/configuration/index.html - view
• chainguard/checks/getting-started/index.html - view
• chainguard/checks/github/index.html - view
• chainguard/checks/identity-and-trust/index.html - view
• chainguard/checks/inspect-and-run-checks/index.html - view
• chainguard/checks/migrate-from-github-actions/index.html - view
• chainguard/checks/overview/index.html - view

There are more changes not included in the list