Fix build failure

Author: jmschonfeld

Sources/FoundationEssentials/String/String+Path.swift

@@ -25,7 +25,7 @@ internal import _FoundationCShims
 extension StringProtocol {
     fileprivate func _standardizing() -> String {
         #if os(Windows)
-        return self.replacing(._backslash, with: ._slash))
+        return self.replacing(._backslash, with: ._slash)
         #else
         return String(self)
         #endif