fix: add override

Author: cedricziel

src/Utils/Test/tests/Unit/MixedBufferTest.php

@@ -12,6 +12,7 @@
 use OpenTelemetry\SDK\Trace\SpanProcessor\SimpleSpanProcessor;
 use OpenTelemetry\SDK\Trace\TracerProvider;
 use OpenTelemetry\TestUtils\TraceStructureAssertionTrait;
+use Override;
 use PHPUnit\Framework\TestCase;
 
 /**
@@ -24,6 +25,7 @@ class MixedBufferTest extends TestCase
     private ArrayObject $sharedBuffer;
     private TracerProvider $tracerProvider;
 
+    #[Override]
     protected function setUp(): void
     {
         // Create a shared buffer for both spans and logrecords