Fix docs for chatops (#256)

Author: Noah Lee

docs/concepts/chatops.md

@@ -2,12 +2,6 @@
 
 ChatOps is a term that’s been coined recently to refer to using chat services, such as Slack or Microsoft Teams, to deploy or run some operations. Gitploy also supports Chatops as a helper tool. 
 
-![Slack deploy](../images/slack-deploy.png)
-
 ## Integration
 
-Currently, Gitploy supports Slack only, but it will support Microsoft Teams near the corner. 
-
-## Limit
-
-Cloud doesn't support Chatops. *Only self-hosted is available.* You can check [how to integrate with Chatops](../tasks/integration.md) for details.
+Currently, Gitploy supports Slack only, but it will support Microsoft Teams near the corner.  You can check [the documentation](../tasks/integration.md) for details.

docs/concepts/review.md

@@ -15,6 +15,6 @@ envs:
       reviewers: ["USER_LOGIN"]
 ```
 
-2\. When the user deploys in the 'deploy' tab, Gitploy request a review to reviewers. And the deployment is waiting until one of reviews is approved.
+2\. When the user deploys in the 'deploy' tab, Gitploy requests a review to reviewers. And the deployment is waiting until one of the reviews is approved.
 
 ![review](../images/review.png)