[Submission page] Fulfilled expectations field instructions to be clarified

On the submission page https://scipost.org/submissions/submit_manuscript/SciPostPhys/scipost, on the new field Fulfilled expectations: We should indicate more clearly that one of them is sufficient. In some submissions, authors have ticked off all the boxes, which could be due to a misunderstanding of the instructions. I propose changing "Please indicate which journal expectations you assert are being fulfilled by this Submission. This information will be publicly visible and scrutinized during the refereeing process." into "Please indicate which journal expectations you assert are being fulfilled by this Submission. At least one should be fulfilled for publication in SciPost Physics. This information will be publicly visible and scrutinized during the refereeing process." Alternative phrasing proposals are welcome.