meta: shorten PowerShell snippet for bug-report template

PR-URL: #44011
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Feng Yu <F3n67u@outlook.com>

.github/ISSUE_TEMPLATE/1-bug-report.yml

@@ -19,7 +19,7 @@ body:
       label: Platform
       description: |
         UNIX: output of `uname -a`
-        Windows: output of `"$([Environment]::OSVersion | ForEach-Object VersionString) $(if ([Environment]::Is64BitOperatingSystem) { "x64" } else { "x86" })"` in PowerShell console
+        Windows: output of `"$([Environment]::OSVersion.VersionString) $(('x86', 'x64')[[Environment]::Is64BitOperatingSystem])"` in PowerShell console
   - type: input
     attributes:
       label: Subsystem