[flybot] Fly CLI docs update

flyctl/cmd/fly_mpg_users.mdx

@@ -14,6 +14,7 @@ fly mpg users [command] [flags]
 * [create](/flyctl/cmd/fly_mpg_users_create)	 - Create a user in an MPG cluster.
 * [delete](/flyctl/cmd/fly_mpg_users_delete)	 - Delete a user from an MPG cluster.
 * [list](/flyctl/cmd/fly_mpg_users_list)	 - List users in an MPG cluster.
+* [rotate-password](/flyctl/cmd/fly_mpg_users_rotate-password)	 - Rotate a user's password in an MPG cluster.
 * [set-role](/flyctl/cmd/fly_mpg_users_set-role)	 - Update a user's role in an MPG cluster.
 
 ## Options

flyctl/cmd/fly_mpg_users_rotate-password.mdx

@@ -0,0 +1,31 @@
+---
+title: fly mpg users rotate-password
+source_url: https://fly.io/docs/flyctl/mpg-users-rotate-password/
+---
+
+Rotate a user's password in a Managed Postgres cluster. Prints the new password.
+Update applications and DATABASE_URL secrets that use the old password.
+
+## Usage
+```
+fly mpg users rotate-password <CLUSTER_ID> [flags]
+```
+## Options
+
+```
+  -h, --help              help for rotate-password
+  -j, --json              JSON output
+      --kill-sessions     Terminate the user's existing database sessions after rotating the password
+  -u, --username string   The username whose password to rotate
+  -y, --yes               Accept all confirmations (also --auto-confirm)
+```
+## Global Options
+
+```
+  -t, --access-token string   Fly API Access Token
+      --debug                 Print additional logs and traces
+      --verbose               Verbose output
+```
+## See Also
+
+* [fly mpg users](/flyctl/cmd/fly_mpg_users)	 - Manage users in a managed postgres cluster