Update Portuguese translation of Namespace documentation to include missing sections from the English version

[Saldanhaa7]

Update Portuguese "Namespaces" documentation to match English source content

This pull request updates the Portuguese translation of the Namespaces documentation to bring it in line with the current English version. The previous translation was missing several important sections and conceptual explanations that have been added to the English page over time.

🔍 Improvements included:

• Addition of the “When to Use Multiple Namespaces” section, including a note about avoiding the use of the default namespace in production environments
• Inclusion of the “Initial namespaces” section describing the four default namespaces (default, kube-system, kube-public, kube-node-lease)
• Addition of the warning block about conflicts between namespace names and public top-level domains (TLDs)
• Updated links to reference correct and up-to-date pages (e.g., replacing outdated references to Lease objects, correcting glossary and concept links)

✅ Purpose

Ensure that Portuguese-speaking users have access to the same up-to-date, accurate, and complete documentation available in English, improving the overall consistency and quality of Kubernetes internationalization.

[linux-foundation-easycla]

• ✅login: Saldanhaa7 / (88797d8)

The committers listed above are authorized under a signed CLA.

[k8s-ci-robot]

Welcome @Saldanhaa7!

It looks like this is your first PR to kubernetes/website 🎉. Please refer to our pull request process documentation to help your PR have a smooth ride to approval.

You will be prompted by a bot to use commands during the review process. Do not be afraid to follow the prompts! It is okay to experiment. Here is the bot commands documentation.

You can also check if kubernetes/website has its own contribution guidelines.

You may want to refer to our testing guide if you run into trouble with your tests not passing.

If you are having difficulty getting your pull request seen, please follow the recommended escalation practices. Also, for tips and tricks in the contribution process you may want to read the Kubernetes contributor cheat sheet. We want to make sure your contribution gets all the attention it needs!

Thank you, and welcome to Kubernetes. 😃

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please assign jcjesus for approval. For more information see the Code Review Process.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• content/pt-br/OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[netlify]

✅ Pull request preview available for checking

Built without sensitive environment variables

Name	Link
🔨 Latest commit	88797d8
🔍 Latest deploy log	https://app.netlify.com/projects/kubernetes-io-main-staging/deploys/685178407227a00008c58cf4
😎 Deploy Preview	https://deploy-preview-51288--kubernetes-io-main-staging.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.