[Cmd-Buf][L0] Fix Coverity unsigned comparison report

Fixes Coverity defect report from L0 command-buffer update
code merged in #1353

```
This greater-than-or-equal-to-zero comparison of an unsigned value is always true. "CommandDesc->newWorkDim >= 0U".
```

source/adapters/level_zero/command_buffer.cpp

@@ -1030,7 +1030,7 @@ UR_APIEXPORT ur_result_t UR_APICALL urCommandBufferUpdateKernelLaunchExp(
  UR_ASSERT(Command, UR_RESULT_ERROR_INVALID_NULL_HANDLE);
  UR_ASSERT(Command->Kernel, UR_RESULT_ERROR_INVALID_NULL_HANDLE);
  UR_ASSERT(CommandDesc, UR_RESULT_ERROR_INVALID_NULL_POINTER);
- UR_ASSERT(CommandDesc->newWorkDim >= 0 && CommandDesc->newWorkDim <= 3,
+ UR_ASSERT(CommandDesc->newWorkDim <= 3,
  UR_RESULT_ERROR_INVALID_WORK_DIMENSION);
 
  // Lock command, kernel and command buffer for update.