workflows: fix description of backoff coefficient

daprdocs/content/en/developing-applications/building-blocks/workflow/workflow-features-concepts.md

@@ -135,7 +135,7 @@ Because workflow retry policies are configured in code, the exact developer expe
 | --- | --- |
 | **Maximum number of attempts** | The maximum number of times to execute the activity or child workflow. |
 | **First retry interval** | The amount of time to wait before the first retry. |
-| **Backoff coefficient** | The amount of time to wait before each subsequent retry. |
+| **Backoff coefficient** | The coefficient used to determine the rate of increase of back-off. For example a coefficient of 2 doubles the wait of each subsequent retry. |
 | **Maximum retry interval** | The maximum amount of time to wait before each subsequent retry. |
 | **Retry timeout** | The overall timeout for retries, regardless of any configured max number of attempts. |