Fix small typo of certification

Why is this change being made?

Gitlab has one of best documentation in the world so there are no room for mistakes such a small typo. I've noticed that and intented to help fix small typo certificaition to certification

Author Checklist

• Provided a concise title for the MR
• Added a description to this MR explaining the reasons for the proposed change, per say-why-not-just-what
• Assign this change to the correct DRI
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