spec: clarify isolators wording in pod schema
spec: clarify isolators wording in pod schema

stufflebear/spec,zenlinTechnofreak/spec,alban/appc-spec,jonboulle/spec,stufflebear/spec,alban/appc-spec,yifan-gu/spec,yifan-gu/spec,tklauser/spec,zenlinTechnofreak/spec,jonboulle/spec,ChengTiesheng/spec,dustymabe/spec,dgonyeo/spec,krnowak/appc-spec,dustymabe/spec,3ofcoins/appc-spec,apcera/appc-spec,appc/spec,tklauser/spec,marineam/spec,iaguis/appc-spec,alban/appc-spec,3ofcoins/appc-spec,craimbert/spec,squeed/spec,ChengTiesheng/spec,stufflebear/spec,ChengTiesheng/spec,krnowak/appc-spec,marineam/spec,dgonyeo/spec,dustymabe/spec,yifan-gu/spec,squeed/spec,craimbert/spec,endocode/appc-spec,3ofcoins/appc-spec,appc/spec,marineam/spec,iaguis/appc-spec,krnowak/appc-spec,tklauser/spec,endocode/appc-spec,squeed/spec,zenlinTechnofreak/spec,dgonyeo/spec,craimbert/spec,endocode/appc-spec,apcera/appc-spec,appc/spec,iaguis/appc-spec,jonboulle/spec,apcera/appc-spec