feat: quickstart diagram update

[vkuma17]

Description

quickstart diagram update to show one zone and requirement of COS bucket

Release required?

• No release
• Patch release (x.x.X)
• Minor release (x.X.x)
• Major release (X.x.x)

Release notes content

Run the pipeline

If the CI pipeline doesn't run when you create the PR, the PR requires a user with GitHub collaborators access to run the pipeline.

Run the CI pipeline when the PR is ready for review and you expect tests to pass. Add a comment to the PR with the following text:

/run pipeline

Checklist for reviewers

• If relevant, a test for the change is included or updated with this PR.
• If relevant, documentation for the change is included or updated with this PR.

For mergers

• Use a conventional commit message to set the release level. Follow the guidelines.
• Include information that users need to know about the PR in the commit message. The commit message becomes part of the GitHub release notes.
• Use the Squash and merge option.

[vburckhardt]

I think there should be a callout box in the diagram to clearly indicate the default is 1 but can be increased to 3

[vkuma17]

I think there should be a callout box in the diagram to clearly indicate the default is 1 but can be increased to 3

@vburckhardt i have made the change.. can you please take another look

[vburckhardt]

could you chat with Jose Monge to ensure this aligns with style guidelines. The callout seems a bit off.