Fix Diffy logo on release page by encoding the image
Fix Diffy logo on release page by encoding the image

Change-Id: I46f21faffc4d53918ecf2de05b9c48f453e18990

qtproject/qtqa-gerrit,MerritCR/merrit,gerrit-review/gerrit,joshuawilson/merrit,WANdisco/gerrit,gerrit-review/gerrit,WANdisco/gerrit,gerrit-review/gerrit,GerritCodeReview/gerrit,MerritCR/merrit,WANdisco/gerrit,gerrit-review/gerrit,WANdisco/gerrit,qtproject/qtqa-gerrit,gerrit-review/gerrit,GerritCodeReview/gerrit,qtproject/qtqa-gerrit,GerritCodeReview/gerrit,MerritCR/merrit,GerritCodeReview/gerrit,joshuawilson/merrit,joshuawilson/merrit,qtproject/qtqa-gerrit,GerritCodeReview/gerrit,joshuawilson/merrit,joshuawilson/merrit,GerritCodeReview/gerrit,qtproject/qtqa-gerrit,MerritCR/merrit,MerritCR/merrit,qtproject/qtqa-gerrit,joshuawilson/merrit,joshuawilson/merrit,joshuawilson/merrit,WANdisco/gerrit,qtproject/qtqa-gerrit,MerritCR/merrit,gerrit-review/gerrit,GerritCodeReview/gerrit,WANdisco/gerrit,WANdisco/gerrit,GerritCodeReview/gerrit,gerrit-review/gerrit,MerritCR/merrit,MerritCR/merrit