ci: fix stdb path normalization regex

jenkins/Jenkinsfile.production-stdb-module-build

@@ -83,7 +83,7 @@ pipeline {
             if ([string]::IsNullOrWhiteSpace($Path)) {
               return $Path
             }
-            $normalized = $Path -replace '\\', '/'
+            $normalized = $Path.Replace('\', '/')
             if ($normalized -match '^([A-Za-z]):/(.*)$') {
               return '/' + $matches[1].ToLower() + '/' + $matches[2]
             }