Add missing resume method documentation (#19989)

Author: bruxodasilva

src/content/docs/workflows/build/workers-api.mdx

@@ -356,6 +356,12 @@ Pause a running Workflow instance.
 
 * <code>pause(): Promise&lt;void&gt;</code>
 
+### resume
+
+Resume a paused Workflow instance.
+
+* <code>resume(): Promise&lt;void&gt;</code>
+
 ### restart
 
 Restart a Workflow instance.