Fix WSL check on Linux on DeX and similar distibutes

Closes #7070

Author: p0deje

rb/lib/selenium/webdriver/common/platform.rb

@@ -96,6 +96,9 @@ def wsl?
         return false unless linux?
 
         File.read('/proc/version').include?('Microsoft')
+      rescue Errno::EACCES
+        # the file cannot be accessed on Linux on DeX
+        false
       end
 
       def cygwin?