bug #81 Fix package name for demo (fabpot)

This PR was merged into the main branch.

Discussion
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Fix package name for demo

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Docs?         | no <!-- required for new features -->
| Issues        | Fix #... <!-- prefix each issue number with "Fix #", no need to create an issue if none exist, explain below instead -->
| License       | MIT

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Commits
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fbccd14 Fix package name for demo

Author: fabpot

demo/composer.json

@@ -1,5 +1,5 @@
 {
-    "name": "symfony-ai/demo",
+    "name": "symfony/ai-demo",
     "type": "project",
     "description": "Symfony AI Demo Application",
     "license": "MIT",