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Apply sentence-style capitalization to H1 headings.

Author: AnnaMHuff

articles/event-grid/mqtt-automotive-connectivity-and-data-solution.md

@@ -1,13 +1,13 @@
 ---
-title: 'Automotive Messaging, Data & Analytics Reference Architecture'
+title: 'Automotive messaging, data & analytics reference architecture'
 description: 'Describes the use case of automotive messaging'
 ms.topic: conceptual
 ms.date: 05/23/2023
 author: msmarioo
 ms.author: marioo
 ---
 
-# Automotive Messaging, Data & Analytics Reference Architecture
+# Automotive messaging, data & analytics reference architecture
 
 This reference architecture is designed to support automotive OEMs and Mobility Providers in the development of advanced connected vehicle applications and digital services. Its goal is to provide reliable and efficient messaging, data and analytics infrastructure. The architecture includes message processing, command processing, and state storage capabilities to facilitate the integration of various services through managed APIs. It also describes a data and analytics solution that ensures the storage and accessibility of data in a scalable and secure manner for digital engineering and data sharing with the wider mobility ecosystem.
 

articles/event-grid/mqtt-support.md

@@ -1,12 +1,12 @@
 ---
-title: 'MQTT Features Support in Azure Event Grid'
+title: 'MQTT features support in Azure Event Grid'
 description: 'Describes the MQTT Support in Azure Event Grid.'
 ms.topic: conceptual
 ms.date: 05/23/2023
 author: george-guirguis
 ms.author: geguirgu
 ---
-# MQTT Features Support in Azure Event Grid
+# MQTT features support in Azure Event Grid
 MQTT is a publish-subscribe messaging transport protocol that was designed for constrained environments. It’s efficient, scalable, and reliable, which made it the gold standard for communication in IoT scenarios. Event Grid supports clients that publish and subscribe to messages over MQTT v3.1.1, MQTT v3.1.1 over WebSockets, MQTT v5, and MQTT v5 over WebSockets. Event Grid also supports cross MQTT version (MQTT 3.1.1 and MQTT 5) communication.
 
 MQTT v5 has introduced many improvements over MQTT v3.1.1 to deliver a more seamless, transparent, and efficient communication. It added: