renaming authentication page

Author: commit111

docs/concepts/authentication.md

@@ -4,9 +4,9 @@ title: Authentication
 description: Authenticating with Defang.
 ---
 
-# Authenticating with Defang
+# Authentication
 
-To do pretty much anything with Defang, you'll need to authenticate with the platform. You can do this by running the following command:
+To do pretty much anything with Defang, you'll need to authenticate with the system. You can do this by running the following command:
 
 ```bash
 defang login

docs/getting-started.mdx

@@ -106,7 +106,7 @@ You can open the folder in your favorite editor and see the files that were gene
 * The `Dockerfile` is used to build the container image for your service.
 * The `compose.yaml` file is used to define the services you want to deploy.
 
-## Deploy to the playground
+## Deploy to the Playground
 
 Go back to your shell and type the following:
 
@@ -122,7 +122,7 @@ Please visit http://127.0.0.1:49154 and log in. (Right click the URL or press EN
 ```
 
 :::info
-To learn more about how authentication works in Defang, check out the [Authenticating With Defang](/docs/concepts/authentication) page.
+To learn more about how authentication works in Defang, check out our [Authentication](/docs/concepts/authentication) page.
 :::
 
 When you do this, you should see something similar to the output below: