Improve logo and url

apps/client/src/app/pages/about/overview/about-overview-page.html

@@ -209,7 +209,7 @@
         <div class="text-center">
           <div class="mb-2 small">Browser testing via</div>
           <a
-            href="https://www.testmu.ai?utm_medium=sponsor&utm_source=ghostfolio"
+            href="https://www.testmuai.com?utm_medium=sponsor&utm_source=ghostfolio"
             target="_blank"
             title="TestMu AI - AI Powered Testing Tool"
           >
@@ -217,9 +217,9 @@
               alt="TestMu AI Logo"
               height="32"
               [src]="
-                user?.settings?.colorScheme === 'LIGHT'
-                  ? '../assets/images/sponsors/logo-testmu-dark.svg'
-                  : '../assets/images/sponsors/logo-testmu-light.svg'
+                user?.settings?.colorScheme === 'DARK'
+                  ? '../assets/images/sponsors/logo-testmu-light.svg'
+                  : '../assets/images/sponsors/logo-testmu-dark.svg'
               "
             />
           </a>