tChapter5 throws visualization warning

[remo-pillat]

Probably just suppress that warning in the test, since it doesn't affect functionality. This warning started popping up in R2025 Prerelease testing.

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2025-03-20T03:48:35.0926304Z <strong>Verification failed in tChapter5/runMLXFile.</strong>
2025-03-20T03:48:35.0926635Z     ----------------
2025-03-20T03:48:35.0926953Z     Test Diagnostic:
2025-03-20T03:48:35.0927269Z     ----------------
2025-03-20T03:48:35.0927547Z     Did not expect any warnings or errors when running chapter5.mlx
2025-03-20T03:48:35.0927867Z     ---------------------
2025-03-20T03:48:35.0928094Z     Framework Diagnostic:
2025-03-20T03:48:35.0928357Z     ---------------------
2025-03-20T03:48:35.0928971Z     <a href="matlab:helpPopup matlab.unittest.TestCase.verifyWarningFree" style="font-weight:bold">verifyWarningFree</a> failed.
2025-03-20T03:48:35.0929510Z     --> The function issued warnings.
2025-03-20T03:48:35.0929750Z         
2025-03-20T03:48:35.0930008Z         Warnings Issued:
2025-03-20T03:48:35.0930429Z             --> Identifier: "MATLAB:graphics:SoftwareMarkerSubsampling"
2025-03-20T03:48:35.0930990Z                    Message: Hardware-accelerated graphics is unavailable. Displaying fewer markers to preserve interactivity.
2025-03-20T03:48:35.0931631Z     
2025-03-20T03:48:35.0931938Z     Evaluated Function:
2025-03-20T03:48:35.0932376Z       <a href="matlab:helpPopup('function_handle')" style="font-weight:bold">function_handle</a> with value:
2025-03-20T03:48:35.0932820Z         @(varargin)testCase.runFile(varargin{:})
2025-03-20T03:48:35.0933076Z     ------------------
2025-03-20T03:48:35.0933436Z     Stack Information:
2025-03-20T03:48:35.0933658Z     ------------------
2025-03-20T03:48:35.0934330Z     In <a href="matlab:opentoline('/home/runner/work/RVC3-MATLAB/RVC3-MATLAB/test/book/RunMLX.m',48,1)">/home/runner/work/RVC3-MATLAB/RVC3-MATLAB/test/book/RunMLX.m (RunMLX.runMLXFile) at 48</a>
2025-03-20T03:48:35.0935247Z ================================================================================