refactor: minor typo (#2185)

Author: jamesgeorge007

lib/Server.js

@@ -299,7 +299,7 @@ class Server {
 
         // - Check if we have a bypass function defined
         // - In case the bypass function is defined we'll retrieve the
-        // bypassUrl from it otherwise byPassUrl would be null
+        // bypassUrl from it otherwise bypassUrl would be null
         const isByPassFuncDefined = typeof proxyConfig.bypass === 'function';
         const bypassUrl = isByPassFuncDefined
           ? proxyConfig.bypass(req, res, proxyConfig)