Move envFrom to the correct position and update example

[huonguyenlt]

Issue

Fix: #3768

Description

1. Move envFrom to outside of the env section
2. Update example in values.yaml

Checklist

• Added tests that cover your change (if possible)
• Added/modified documentation as required (such as the README.md, or the docs directory)
• Manually tested
• Made sure the title of the PR is a good description that can go into the release notes

BONUS POINTS checklist: complete for good vibes and maybe prizes?! 🤯

• Backfilled missing tests for code in same general area 🎉
• Refactored something and made the world a better place 🌟

[linux-foundation-easycla]

• ✅login: huonguyenlt / (cd2d4d1)

The committers listed above are authorized under a signed CLA.

[k8s-ci-robot]

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[k8s-ci-robot]

Hi @huonguyenlt. Thanks for your PR.

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[shraddhabang]

/ok-to-test

[oliviassss]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: huonguyenlt, oliviassss

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