fix: add missing highlights in some code snippets

Author: a-dinoto

fern/pages/02-speech-to-text/pre-recorded-audio/multichannel-transcription.mdx

@@ -312,7 +312,7 @@ while true
 end
 ```
 
-```php title="PHP" highlight={75} maxLines=15
+```php title="PHP" highlight={30} maxLines=15
 <?php
 $ch = curl_init();
 curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

fern/pages/03-audio-intelligence/key-phrases.mdx

@@ -354,7 +354,7 @@ class Program
 
   Enable Key Phrases by setting `auto_highlights` to `true` in the JSON payload.
 
-```ruby {23}
+```ruby {22}
 require 'net/http'
 require 'json'
 

fern/pages/04-lemur/ask-questions.mdx

@@ -928,7 +928,7 @@ end
 
   <Tab language="php" title="PHP">
 
-```php
+```php {42-64}
 <?php
 $base_url = "https://api.assemblyai.com";
 $headers = array(

fern/pages/04-lemur/summarize-audio.mdx

@@ -823,7 +823,7 @@ puts lemur_result["response"]
 
   <Tab language="php" title="PHP">
 
-```php
+```php {42-53}
 <?php
 $base_url = "https://api.assemblyai.com";
 $headers = array(