minor #75 chore: update demo to latest changes (chr-hertel)

This PR was merged into the main branch.

Discussion
----------

chore: update demo to latest changes

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| Docs?         | no
| Issues        |
| License       | MIT

Cherry piclking php-llm/llm-chain-symfony-demo#29

Waits for
* #74
* #73

Commits
-------

1f74c6c chore: update to llm-chain 0.24 (#29)

Author: chr-hertel

demo/composer.json

@@ -11,6 +11,8 @@
         "ext-iconv": "*",
         "codewithkyrian/chromadb-php": "^0.4.0",
         "league/commonmark": "^2.7",
+        "mrmysql/youtube-transcript": "^0.0.5",
+        "php-http/discovery": "^1.20",
         "runtime/frankenphp-symfony": "^0.2.0",
         "symfony/ai-bundle": "@dev",
         "symfony/asset": "7.3.*",