minor fixes

Author: asergaz

articles/iot/index.yml

@@ -49,7 +49,6 @@ highlightedContent:
       url: /azure/architecture/browse/?azure_categories=iot
 
 productDirectory:
-  title: Azure IoT services
   items:
     # Card
     - title: Azure IoT Operations
@@ -68,7 +67,7 @@ productDirectory:
       url: ../iot-central/index.yml
     # Card
     - title: Azure Digital Twins
-      summary: he Azure Digital Twins service is typically part of a cloud-based IoT solution based on IoT Hub
+      summary: The Azure Digital Twins service is typically part of a cloud-based IoT solution based on IoT Hub
       imageSrc: ../media/index/digital-twins.svg
       url: ../digital-twins/index.yml
     # Card
@@ -77,7 +76,7 @@ productDirectory:
       imageSrc: ../media/index/iot-edge.svg
       url: ../iot-edge/index.yml
     # Card
-    - title: Event Grid
+    - title: Azure Event Grid
       summary: Currently, Azure Event Grid is typically part of a hybrid IoT solution that uses Azure IoT Operations, IoT Hub, or IoT Central
       imageSrc: ../media/index/event-grid-domains.svg
       url: ../event-grid/index.yml