Update AppHeader.js

fix: activeClassName prop does not exists anymore

Author: mrholek

src/components/AppHeader.js

@@ -36,7 +36,7 @@ const AppHeader = () => {
         </CHeaderBrand>
         <CHeaderNav className="d-none d-md-flex me-auto">
           <CNavItem>
-            <CNavLink to="/dashboard" component={NavLink} activeclassname="active">
+            <CNavLink to="/dashboard" component={NavLink}>
               Dashboard
             </CNavLink>
           </CNavItem>