Improved detection of JXL files

Author: SoftCreatR

src/SoftCreatR/MimeDetector/MimeDetector.php

@@ -877,7 +877,10 @@ public function getFileType(): array
             ];
         }
 
-        if ($this->checkForBytes([0x00, 0x00, 0x00, 0x0C, 0x4A, 0x58, 0x4C, 0x20, 0x0D, 0x0A, 0x87, 0x0A])) {
+        if (
+            $this->checkForBytes([0xFF, 0x0A]) ||
+            $this->checkForBytes([0x00, 0x00, 0x00, 0x0C, 0x4A, 0x58, 0x4C, 0x20, 0x0D, 0x0A, 0x87, 0x0A])
+        ) {
             return [
                 'ext' => 'jxl',
                 'mime' => 'image/jxl'