fix: MainThread check checks for Job execution (#2226)

Author: bitsandfoxes

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 ### Fixes
 
+- The check used to verify whether the current thread is the main-thread now includes `JobsUtility.IsExecutingJob` to support running in Burst. ([#2226](https://github.com/getsentry/sentry-unity/pull/2226))
 - For targeting iOS, the Unity SDK now brings an iOS-only `.xcframework`, reducing package size. ([#2264](https://github.com/getsentry/sentry-unity/pull/2264))
 
 ### Dependencies

src/Sentry.Unity/MainThreadData.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Threading;
+using Unity.Jobs.LowLevel.Unsafe;
 using UnityEngine;
 
 namespace Sentry.Unity;
@@ -70,7 +71,7 @@ internal static class MainThreadData
     public static DateTimeOffset? StartTime { get; set; }
 
     public static bool IsMainThread()
-        => MainThreadId.HasValue && Thread.CurrentThread.ManagedThreadId == MainThreadId;
+        => !JobsUtility.IsExecutingJob && MainThreadId.HasValue && Thread.CurrentThread.ManagedThreadId == MainThreadId;
 
     // For testing
     internal static ISentrySystemInfo? SentrySystemInfo { get; set; }