(maint) Add new signature to upgrade check

When upgrading Chocolatey, if the certificate subject doesn't match a
known Chocolatey certificate we don't replace the file. The certificate
used for signing changed slightly, this adds the new subject to the
check.

nuspec/chocolatey/chocolatey/tools/chocolateysetup.psm1

@@ -48,6 +48,7 @@ function Remove-ShimWithAuthenticodeSignature {
   $possibleSignatures = @(
     'RealDimensions Software, LLC'
     'Chocolatey Software, Inc\.'
+    'Chocolatey Software, Inc'
   )
 
   $possibleSignatures | ForEach-Object {