Use comma for noindex, nofollow, in 12.10 branch

Marcel Amiraultrequested to merge
add-comma-noindex-12-10 into 12.10

Cherry-pick the change from the related MR, to add comma for noindex, nofollow, to hopefully stop google from indexing the 12.10 pages.

Related to !2099 (merged)

Edited by Marcel Amirault

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