minor #1269 Switch image url examples away from wikipedia (chr-hertel)

This PR was merged into the main branch.

Discussion
----------

 Switch image url examples away from wikipedia

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| Docs?         | no
| Issues        | Fix #... <!-- prefix each issue number with "Fix #", no need to create an issue if none exist, explain below instead -->
| License       | MIT

At least i know that domain doesn't ban AI crawler .. better ideas welcome!

Commits
-------

d9de496 Switch image url examples away from wikipedia

Author: OskarStark

examples/openai/image-input-url.php

@@ -22,7 +22,7 @@
     Message::forSystem('You are an image analyzer bot that helps identify the content of images.'),
     Message::ofUser(
         'Describe the image as a comedian would do it.',
-        new ImageUrl('https://upload.wikimedia.org/wikipedia/commons/thumb/3/31/Webysther_20160423_-_Elephpant.svg/350px-Webysther_20160423_-_Elephpant.svg.png'),
+        new ImageUrl('https://christopher-hertel.de/images/projects/llmchain.png'),
     ),
 );
 $result = $platform->invoke('gpt-4o-mini', $messages);

examples/perplexity/image-input-url.php

@@ -22,7 +22,7 @@
     Message::forSystem('You are an image analyzer bot that helps identify the content of images.'),
     Message::ofUser(
         'Describe the image as a comedian would do it.',
-        new ImageUrl('https://upload.wikimedia.org/wikipedia/commons/thumb/3/31/Webysther_20160423_-_Elephpant.svg/350px-Webysther_20160423_-_Elephpant.svg.png'),
+        new ImageUrl('https://christopher-hertel.de/images/projects/llmchain.png'),
     ),
 );
 $result = $platform->invoke('sonar', $messages);