Fix typo of the index of doc

Author: noah

README.md

@@ -10,7 +10,7 @@
 Gitploy helps your team or organization builds the system around GitHub in minutes. Gitploy provides these features:
 
 * Deploy a specific ref (branch, commit, tag)
-* Build an event-driven system around GitHub [deployment API](https://docs.github.com/en/rest/reference/repos#deployments)
+* Build an event-driven deployment system around GitHub [deployment API](https://docs.github.com/en/rest/reference/repos#deployments)
 * Integrate with GitHub [Action](https://github.com/features/actions) in minutes
 
 If you want to look around, you can check the [document](https://docs.gitploy.io) of Gitploy.

docs/index.md

@@ -3,7 +3,7 @@
 If your team or organization develops with GitHub, you can build the deployment system around Gitploy in minutes. Gitploy provides these features:
 
 * Deploy a specific ref (branch, commit, tag)
-* Build an event-driven system around GitHub [deployment API](https://docs.github.com/en/rest/reference/repos#deployments)
+* Build an event-driven deployment system around GitHub [deployment API](https://docs.github.com/en/rest/reference/repos#deployments)
 * Integrate with GitHub [Action](https://github.com/features/actions) in minutes
 
 Try to build the deployment system with Gitploy ([doc](./tasks/installation.md)).