991761: Replace obsolete Class used in CSP

Author: Athiswaran-SF3980

ej2-asp-core-mvc/common/EJ2_ASP.NETCORE/content-security-policy.md

@@ -8,7 +8,7 @@ publishingplatform: ##Platform_Name##
 documentation: ug
 ---
 
-# Content Security Policy in ASp.Net Core
+# Content Security Policy in ASP.NET Core
 
 Content Security Policy (CSP) is a security feature implemented by web browsers to protect against attacks such as cross-site scripting (XSS) and data injection. It limits the sources from which content can be loaded on a web page. To enable strict Content Security Policy (CSP), certain browser features are disabled by default. To use Syncfusion<sup style="font-size:70%">&reg;</sup> controls with strict CSP mode, it is essential to include the following directives: