Disable code signing as we don't have a valid certificate anymore

Starting June 1, 2023 CA/Browser Forum requires private keys for code signing certificates to be stored
on hardware certified as FIPS 140 Level 2, Common Criteria EAL 4+, or equivalent.

This prohibits open source developers from obtaining certificates to sign code in GitHub Actions.

.github/Get-BuildInfo.ps1

@@ -31,7 +31,8 @@ $app_version_suffix = "preview${env:GITHUB_RUN_NUMBER}"
 
 if ($configuration -ieq 'release') {
   if ($event_name -notlike 'pull_request') {
-    $sign_binaries = 'true'
+    # temporary disabled as we don't have a valid certificate
+    $sign_binaries = 'false'
   }
 
   if ($ref -like 'refs/tags/v*') {