tree a30aec1bbdae5621fa199f04cff15c3bc36a00de
parent 02b074fd90aa31e3eab3b36353af31b04a409624
author DRC <information@libjpeg-turbo.org> 1688394324 -0400
committer DRC <information@libjpeg-turbo.org> 1688394695 -0400

AppVeyor: Use SignPath release cert/only sign tags

The SignPath release certificate for our project is not yet available as
of this writing, but this commit prepares the CI system to use the
release certificate whenever it becomes available.  It also restricts
signing only to tags, which correspond to official releases.  (That
mimics our traditional policy of not signing pre-release builds.)