Fix JavaScript MIME type from javascript/x-javascript to text/javascript

Co-authored-by: rvosa <106490+rvosa@users.noreply.github.com>

Author: Copilot

treebase-web/src/main/webapp/scripts/validator.jsp

@@ -1,4 +1,4 @@
-<%@ page language="java" contentType="javascript/x-javascript" %>
+<%@ page language="java" contentType="text/javascript" %>
 <%@ taglib uri="http://www.springmodules.org/tags/commons-validator" prefix="v" %>
 
 <v:javascript dynamicJavascript="false" staticJavascript="true"/>