CI Failure in MATLAB Tests begin of September 2023

[traversaro]

1/1 Test #62: matlab_idyntree_tests ............***Failed   35.04 sec

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Errors while running CTest
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{�Error using iDynTree.Position (line 10)
Invalid MEX-file '/home/runner/work/idyntree/idyntree/build/lib/iDynTreeMEX.mexa64': /usr/local/MATLAB/R2020b/bin/glnxa64/../../sys/os/glnxa64/libgfortran.so.5: version
`GFORTRAN_10' not found (required by /usr/share/miniconda3/envs/test/lib/./libspral.so)

Error in PositionUnitTest>test_sum_of_positions (line 15)
    pos1 = iDynTree.Position();

Error in PositionUnitTest (line 7)
    test_sum_of_positions

Same problem of robotology/robotology-superbuild#1461, let's do the same fix.