Fix capitalization error in sentence by adding an uppercase letter at beginning

Signed-off-by: aroramrinaal <[email protected]>

docs/reference/compose_run.md

@@ -36,7 +36,7 @@ Run a one-off command on a service.
 
 Runs a one-time command against a service.
 
-the following command starts the `web` service and runs `bash` as its command:
+The following command starts the `web` service and runs `bash` as its command:
 
 ```console
 $ docker compose run web bash