Update README.md

Author: pitbulk

README.md

@@ -406,7 +406,7 @@ In addition to the required settings data (idp, sp), extra settings can be defin
         //    'http://www.w3.org/2001/04/xmlenc#sha256'
         //    'http://www.w3.org/2001/04/xmldsig-more#sha384'
         //    'http://www.w3.org/2001/04/xmlenc#sha512'
-        'digestAlgorithm' => 'http://www.w3.org/2000/09/xmldsig#sha1
+        "digestAlgorithm": "http://www.w3.org/2000/09/xmldsig#sha1"
     },
 
     // Contact information template, it is recommended to supply