Update FAQ.md

Author: miaojiang

FAQ.md

@@ -1,13 +1,10 @@
 # Azure API Management DevOps FAQ
 
-### Is everything available through ARM templates now?
+### Can I deploy everything through ARM templates now?
 The only thing that's not available is developer portal content. Everything else is available through ARM.  
 
-### Is there a size limit of ARM templates?
-Yes, each template is limited to 1MB. Our proposed approach uses linked templates, which helps to keep each template relatively small. 
-
 ### Your example is hosted in a public repo on Github, what if I want to use a private repo? 
 Check out this [article](https://blog.eldert.net/api-management-ci-cd-using-arm-templates-linked-template/), if you use a private repo, you can add a step in your pipeline to copy the linked templates to a blob container and access the files with a SAS token. 
 
-### How do I deploy all configurations versus just deploy an API?
-In our example, each template can be deployed individually. You can also use the master template, which ties everything together, to deploy all templates. 
+### Why did I run into `PessimisticConcurrencyConflict` error when trying to deploy the templates? 
+If you are trying to make multiple changes to the same API (e.g., import an Open API definition, add to a product), then you should daisy chain the operations using the DependsOn element.