quincy: doc/rados: standardize markup of "clean"

[zdover23]

Standardize the markup around the status "clean" in the documentation so that readers don't mistakenly get the idea that inconsistent presentation of the word "clean" implies a never-stated difference between one instance and the other.

Signed-off-by: Zac Dover [email protected] (cherry picked from commit c8b4155d2d27228917d4be1f11514504100c55c7)

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