docs - aws gettingstarted.rst fixed typo in policy(#4059)
docs - aws gettingstarted.rst fixed typo in policy(#4059)

There was a typo in the stop action section of the custodian.yml fiel contents
Sutto/cloud-custodian,ewbankkit/cloud-custodian,alfredgamulo/cloud-custodian,ocampocj/cloud-custodian,ewbankkit/cloud-custodian,capitalone/cloud-custodian,capitalone/cloud-custodian,FireballDWF/cloud-custodian,Sutto/cloud-custodian,FireballDWF/cloud-custodian,kapilt/cloud-custodian,FireballDWF/cloud-custodian,thisisshi/cloud-custodian,ewbankkit/cloud-custodian,capitalone/cloud-custodian,kapilt/cloud-custodian,thisisshi/cloud-custodian,kapilt/cloud-custodian,kapilt/cloud-custodian,Sutto/cloud-custodian,ocampocj/cloud-custodian,ewbankkit/cloud-custodian,alfredgamulo/cloud-custodian,capitalone/cloud-custodian,thisisshi/cloud-custodian,FireballDWF/cloud-custodian,Sutto/cloud-custodian,ocampocj/cloud-custodian,alfredgamulo/cloud-custodian,ocampocj/cloud-custodian