message: build: merge the signing steps and wildcard them
  This allows me to make the build pipeline, instead of the release
  engineer, put the version number in the package name.
  It also lets us sign multiple packages (if we ever produce more than
  one.)
diff: <SignConfigXML>
  <job platform="" configuration="" certSubject="CN=Microsoft Corporation, O=Microsoft Corporation, L=Redmond, S=Washington, C=US" jobname="EngFunSimpleSign" approvers="">
  - <file src="__INPATHROOT__\Microsoft.WindowsTerminal_8wekyb3d8bbwe.msixbundle" signType="136020001" dest="__OUTPATHROOT__\Microsoft.WindowsTerminal_8wekyb3d8bbwe.msixbundle" />
  - <file src="__INPATHROOT__\Microsoft.WindowsTerminalUniversal_8wekyb3d8bbwe.msixbundle" signType="136020001" dest="__OUTPATHROOT__\Microsoft.WindowsTerminalUniversal_8wekyb3d8bbwe.msixbundle" />
  + <file src="__INPATHROOT__\Microsoft.WindowsTerminal*.msixbundle" signType="136020001" />
  </job>
  </SignConfigXML>
  