Update limits.mdx

Author: ericallam

docs/limits.mdx

@@ -27,6 +27,16 @@ Generally speaking each SDK call is an API call.
 
 <RateLimitHitUseBatchTrigger/>
 
+## Queued tasks
+
+The number of queued tasks by environment
+
+| Limit | Details                   |
+| ----- | ------------------------- |
+| Dev   | At most 500 |  
+| Staging   | at most 10 million |  
+| Prod   | at most 10 million |
+
 ## Schedules
 
 | Limit     | Details       |
@@ -55,4 +65,4 @@ Payloads and outputs that exceed 512KB will be offloaded to object storage and a
 
 The default machine is `small-1x` which has 0.5 vCPU and 0.5 GB of RAM. You can optionally configure a higher spec machine which will increase the cost of running the task but can also improve the performance of the task if it is CPU or memory bound.
 
-See the [machine configurations](/machines#machine-configurations) for more details.
+See the [machine configurations](/machines#machine-configurations) for more details.