Fix typos

Author: anthonychu

articles/azure-functions/durable/durable-functions-overview.md

@@ -67,7 +67,7 @@ public static async Task<object> Run(
 }
 ```
 
-You can use the `context` parameter [IDurableOrchestrationContext] to invoke other functions by name, pass parameters, and return function output. Each time the code calls `await`, the Durable Functions framework checkpoints the progress of the current function instance. If the process or virtual machine recycles midway through the execution, the function instance resumes from the preceding `await` call. For more information, see the next section, Pattern #2: Fan out/fan in.
+You can use the `context` parameter to invoke other functions by name, pass parameters, and return function output. Each time the code calls `await`, the Durable Functions framework checkpoints the progress of the current function instance. If the process or virtual machine recycles midway through the execution, the function instance resumes from the preceding `await` call. For more information, see the next section, Pattern #2: Fan out/fan in.
 
 # [JavaScript](#tab/javascript)
 
@@ -339,7 +339,7 @@ To create the durable timer, call `context.df.createTimer`. The notification is
 
 ---
 
-An external client can deliver the event notification to a waiting orchestrator function by using either the [built-in HTTP APIs](durable-functions-http-api.md#raise-event):
+An external client can deliver the event notification to a waiting orchestrator function by using the [built-in HTTP APIs](durable-functions-http-api.md#raise-event):
 
 ```bash
 curl -d "true" http://localhost:7071/runtime/webhooks/durabletask/instances/{instanceId}/raiseEvent/ApprovalEvent -H "Content-Type: application/json"