Update build triggers API documentation (#10153)
Update build triggers API documentation (#10153)

Update build triggers API documentation
[ci skip]

* Ensure updated/deleted timestamps are consistent

SVArago/gitlabhq,dplarson/gitlabhq,openwide-java/gitlabhq,dplarson/gitlabhq,daiyu/gitlab-zh,shinexiao/gitlabhq,iiet/iiet-git,SVArago/gitlabhq,LUMC/gitlabhq,martijnvermaat/gitlabhq,openwide-java/gitlabhq,htve/GitlabForChinese,Soullivaneuh/gitlabhq,icedwater/gitlabhq,iiet/iiet-git,jirutka/gitlabhq,htve/GitlabForChinese,axilleas/gitlabhq,mmkassem/gitlabhq,iiet/iiet-git,daiyu/gitlab-zh,allysonbarros/gitlabhq,shinexiao/gitlabhq,stoplightio/gitlabhq,jirutka/gitlabhq,mmkassem/gitlabhq,jirutka/gitlabhq,t-zuehlsdorff/gitlabhq,screenpages/gitlabhq,dreampet/gitlab,mr-dxdy/gitlabhq,allysonbarros/gitlabhq,icedwater/gitlabhq,dreampet/gitlab,mr-dxdy/gitlabhq,screenpages/gitlabhq,htve/GitlabForChinese,darkrasid/gitlabhq,martijnvermaat/gitlabhq,dreampet/gitlab,SVArago/gitlabhq,daiyu/gitlab-zh,SVArago/gitlabhq,screenpages/gitlabhq,larryli/gitlabhq,Soullivaneuh/gitlabhq,axilleas/gitlabhq,mmkassem/gitlabhq,mmkassem/gitlabhq,Soullivaneuh/gitlabhq,mr-dxdy/gitlabhq,LUMC/gitlabhq,htve/GitlabForChinese,openwide-java/gitlabhq,iiet/iiet-git,Soullivaneuh/gitlabhq,darkrasid/gitlabhq,allysonbarros/gitlabhq,shinexiao/gitlabhq,darkrasid/gitlabhq,screenpages/gitlabhq,shinexiao/gitlabhq,dplarson/gitlabhq,dplarson/gitlabhq,LUMC/gitlabhq,allysonbarros/gitlabhq,openwide-java/gitlabhq,stoplightio/gitlabhq,mr-dxdy/gitlabhq,martijnvermaat/gitlabhq,LUMC/gitlabhq,stoplightio/gitlabhq,darkrasid/gitlabhq,axilleas/gitlabhq,stoplightio/gitlabhq,daiyu/gitlab-zh,larryli/gitlabhq,icedwater/gitlabhq,t-zuehlsdorff/gitlabhq,t-zuehlsdorff/gitlabhq,jirutka/gitlabhq,dreampet/gitlab,icedwater/gitlabhq,larryli/gitlabhq,larryli/gitlabhq,t-zuehlsdorff/gitlabhq,axilleas/gitlabhq,martijnvermaat/gitlabhq