Update blog date and add contributor acknowledgement

[kirti763]

Follow up to #53172

• Updated publication date
• Added acknowledgement for original contributors

Description

Issue

Closes: #53172

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[lmktfy]

If doing a move, you should also remove the previous / old file, ie content/en/blog/_posts/2025-11-11-kubernetes-configuration-best-practices/index.md

[kirti763]

done @lmktfy