Update guides_search.adoc
Update guides_search.adoc

swapped links as per RT https://helpdesk.ebi.ac.uk/Ticket/Display.html?id=491300
EBIBioSamples/biosamples-v4,EBIBioSamples/biosamples-v4,EBIBioSamples/biosamples-v4,EBIBioSamples/biosamples-v4