Bug 1633385 [wpt PR 23262] - Fix invalid string escape, a=testonly

Automatic update from web-platform-tests
Fix invalid string escape
--

wpt-commits: d30822cd8a236a97442ff4619e95d926065609b3
wpt-pr: 23262

testing/web-platform/tests/tools/wpt/browser.py

@@ -913,7 +913,7 @@ class EdgeChromium(Browser):
                             os.path.expandvars("$SYSTEMDRIVE\\Program Files (x86)\\Microsoft\\Edge\\Application"),
                             os.path.expandvars("$SYSTEMDRIVE\\Program Files (x86)\\Microsoft\\Edge Beta\\Application"),
                             os.path.expandvars("$SYSTEMDRIVE\\Program Files (x86)\\Microsoft\\Edge Dev\\Application"),
-                            os.path.expanduser("~\\AppData\Local\\Microsoft\\Edge SxS\\Application")]
+                            os.path.expanduser("~\\AppData\\Local\\Microsoft\\Edge SxS\\Application")]
                 return find_executable(binaryname, os.pathsep.join(winpaths))
         if self.platform == "macos":
             binaryname = "Microsoft Edge Canary"