Update README.md

fix typo

Author: jeandelavarene

README.md

@@ -36,7 +36,7 @@ For deploying your Java App with the App Stack, here is the list of OCI prerequi
 
 - **DevOps project (optional):** A Java application in an OCI DevOps project (can be a mirror of an existing GitHub repo). This isn't required if the application is provided as a container image.
 - **Database:** an existing Autonomous Database  - Shared Infrastructure (ADB-S) can be used with the stack. The stack may create a new one, if specified during the Stack configuration. 
-- **Vault (optional):** A new user in IAM (<application_name>-user) is created and his token used for connectng to the DevOps repo, is stored in the vault. When the stack is destroyed this user is removed. A Vault is necessary to avoid the limit on the number of tokens the current user has however, the Vault isn't required if the application is provided as a container image.
+- **Vault (optional):** A new user in IAM (<application_name>-user) is created and its token used for connectng to the DevOps repo, is stored in the vault. When the stack is destroyed this user is removed. A Vault is necessary to avoid the limit on the number of tokens the current user has however, the Vault isn't required if the application is provided as a container image.
 - **DNS (optional):** A DNS zone for creating the application URL (for example https://myapp.domain.com). If not provided during the stack configuration, the application will be available through the load balancer's public IP. You can then configure your third-party DNS provider to point to this IP address.
 - **HTTPS certificate (optional):** is needed for the load balancer. If no certificate is provided, HTTP will be used against the IP address.