Fix code scanning alert no. 13: Useless regular-expression character …

…escape

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

assets/plugins/bootstrap-wysihtml5/bootstrap3-wysihtml5.all.js

@@ -4205,7 +4205,7 @@ wysihtml5.browser = (function() {
         re;
 
     if (navigator.appName == 'Microsoft Internet Explorer') {
-      re = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
+      re = new RegExp("MSIE ([0-9]{1,}[.0-9]{0,})");
     } else if (navigator.appName == 'Netscape') {
       re = new RegExp("Trident/.*rv:([0-9]{1,}[.0-9]{0,})");
     }