Update data-collection-text-log.md

Author: meckhardt

articles/azure-monitor/agents/data-collection-text-log.md

@@ -285,7 +285,7 @@ To create the data collection rule in the Azure portal:
     See [Structure of a data collection rule in Azure Monitor (preview)](../essentials/data-collection-rule-structure.md#custom-logs) if you want to modify the text log DCR.
 
     > [!IMPORTANT]
-    > Custom data collection rules have a suffix of *Custom-*; for example, *Custom-rulename*. The *Custom-rulename* in the stream declaration must match the *Custom-rulename* name in the Log Analytics workspace.
+    > Custom data collection rules have a prefix of *Custom-*; for example, *Custom-rulename*. The *Custom-rulename* in the stream declaration must match the *Custom-rulename* name in the Log Analytics workspace.
 
 1. Select **Save**.
 
@@ -457,4 +457,4 @@ Learn more about:
 
 - [Azure Monitor Agent](azure-monitor-agent-overview.md).
 - [Data collection rules](../essentials/data-collection-rule-overview.md).
-- [Best practices for cost management in Azure Monitor](../best-practices-cost.md).
+- [Best practices for cost management in Azure Monitor](../best-practices-cost.md).