Update article names in SUMMARY

Author: sofietoft

13/umbraco-ums/SUMMARY.md

@@ -177,7 +177,7 @@
 * [How to Personalize content](tutorials/how-to-personalize-content.md)
 * [8 steps towards the ideal A/B test](tutorials/8-steps-towards-the-ideal-ab-test.md)
 * [Partner Demos](tutorials/partner-demos.md)
-* [marketing-resources](tutorials/marketing-resources/README.md)
-  * [generic-exit-intent-popup-template](tutorials/marketing-resources/generic-exit-intent-popup-template.md)
-  * [generic-popup-template](tutorials/marketing-resources/generic-popup-template.md)
-  * [generic-topbar-template](tutorials/marketing-resources/generic-topbar-template.md)
+* [Marketing Resources](tutorials/marketing-resources/README.md)
+  * [Generic Exit Intent Popup Template](tutorials/marketing-resources/generic-exit-intent-popup-template.md)
+  * [Generic Popup Template](tutorials/marketing-resources/generic-popup-template.md)
+  * [Generic Topbar Template](tutorials/marketing-resources/generic-topbar-template.md)