Fix lifecycle FileTree example

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: davidfowl

src/frontend/src/content/docs/deployment/app-lifecycle.mdx

@@ -298,8 +298,9 @@ The `aspire publish` command does the following:
 - Outputs artifacts to `./aspire-output/` directory
 
 <FileTree>
-  - aspire-output/ - docker-compose.yaml Service definitions for all containers
-  - .env Template for required environment variables
+  - aspire-output/
+    - docker-compose.yaml Service definitions for all containers
+    - .env Template for required environment variables
 </FileTree>
 
 <LearnMore>