Fix TOC, case

Author: Pat Altimore

articles/iot-operations/connect-to-cloud/howto-dataflow-graph-wasm.md

@@ -1,5 +1,5 @@
 ---
-title: Use WebAssembly (WASM) with data flow graphs (Preview)
+title: Use WebAssembly (WASM) with data flow graphs (preview)
 description: Learn how to deploy and use WebAssembly modules with data flow graphs in Azure IoT Operations to process data at the edge.
 author: PatAltimore
 ms.author: patricka
@@ -11,7 +11,7 @@ ai-usage: ai-assisted
 
 ---
 
-# Use WebAssembly (WASM) with data flow graphs (Preview)
+# Use WebAssembly (WASM) with data flow graphs (preview)
 
 > [!IMPORTANT]
 > WebAssembly (WASM) with data flow graphs is in **preview**. This feature has limitations and isn't for production workloads. 

articles/iot-operations/toc.yml

@@ -141,6 +141,9 @@ items:
       - name: Disk-backed message buffer
         href: manage-mqtt-broker/howto-disk-backed-message-buffer.md
         displayName: MQTT, broker, persistence, storage
+      - name: Broker persistence
+        href: manage-mqtt-broker/howto-broker-persistence.md
+        displayName: MQTT, broker, persistence, storage
       - name: Diagnostic settings
         href: manage-mqtt-broker/howto-broker-diagnostics.md
         displayName: MQTT, broker, metrics, logs