docs: Add 'DO NOT EDIT' comment

[ghost]

What?

Adds missing "DO NOT EDIT" comment to some of the shared documentation pages"

Why?

A few of the shared documentation files didn't have the comment to not edit them.

[vercel-spaces]

Notifying the following users due to files changed in this PR:

@timneutkens, @ijjk, @shuding, @huozhi, @feedthejim:

docs/03-pages/01-building-your-application/05-optimizing/06-lazy-loading.mdx
docs/03-pages/02-api-reference/01-components/script.mdx
docs/03-pages/02-api-reference/02-functions/use-report-web-vitals.mdx

This comment was posted based on the notify modifier.

[ijjk]

Allow CI Workflow Run

• approve CI run for commit: db70a92

Note: this should only be enabled once the PR is ready to go and can only be enabled by a maintainer

[ijjk]

Allow CI Workflow Run

• approve CI run for commit: db70a92

Note: this should only be enabled once the PR is ready to go and can only be enabled by a maintainer

[ijjk]

Allow CI Workflow Run

• approve CI run for commit: db70a92

Note: this should only be enabled once the PR is ready to go and can only be enabled by a maintainer

[delbaoliveira]

Thank you!