Resource type is determined by first link header, as opposed to first Link with rel="type"

[joshdcollins]

Per chat with Aaron -- affected code is:
https://github.com/trellis-ldp/trellis/blob/main/core/common/src/main/java/org/trellisldp/common/TrellisRequest.java#L117-L122