[Platform] Fix exception message thrown in File::fromDataUrl method

Author: hhamon

src/platform/src/Message/Content/File.php

@@ -31,7 +31,7 @@ final public function __construct(
     public static function fromDataUrl(string $dataUrl): static
     {
         if (!str_starts_with($dataUrl, 'data:')) {
-            throw new InvalidArgumentException('Invalid audio data URL format.');
+            throw new InvalidArgumentException('Invalid file data URL format.');
         }
 
         return new static(

src/platform/tests/Message/Content/AudioTest.php

@@ -36,7 +36,7 @@ public function testFromDataUrlWithValidUrl()
     public function testFromDataUrlWithInvalidUrl()
     {
         $this->expectException(\InvalidArgumentException::class);
-        $this->expectExceptionMessage('Invalid audio data URL format.');
+        $this->expectExceptionMessage('Invalid file data URL format.');
 
         Audio::fromDataUrl('invalid-url');
     }

src/platform/tests/Message/Content/BinaryTest.php

@@ -32,7 +32,7 @@ public function testCreateFromDataUrl()
     public function testThrowsExceptionForInvalidDataUrl()
     {
         $this->expectException(InvalidArgumentException::class);
-        $this->expectExceptionMessage('Invalid audio data URL format.');
+        $this->expectExceptionMessage('Invalid file data URL format.');
 
         File::fromDataUrl('invalid-data-url');
     }