Fix redirects.yaml reference to redirects.yml

Why is this change being made?

The page refers to redirects.yaml when the file is redirects.yml

Does this MR meet the acceptance criteria?

Assign to DRI

• Did you assign this change to the correct DRI of the page or information you are changing?

Conformity

• Added description to this MR explaining the reasons for the proposed change, per say-why-not-just-what