community/opencascade: fix build error for opencascade

doxygen-1.11.0 can not parse brep_format.md and draw_test_harness.md

when build opencascade,i got the log as follow:

warning: Tag 'HTML_TIMESTAMP' at line 41 of file '/home/alpine/aports/community/opencascade/src/OCCT-7_8_1/build/doc/occt.cfg' has become obsolete.
         To avoid this warning please remove this line from your configuration file or upgrade it using "doxygen -u"
warning: Tag 'FORMULA_TRANSPARENT' at line 52 of file '/home/alpine/aports/community/opencascade/src/OCCT-7_8_1/build/doc/occt.cfg' has become obsolete.
         To avoid this warning please remove this line from your configuration file or upgrade it using "doxygen -u"
/usr/include/c++/13.2.1/string_view:256: constexpr const std::basic_string_view<_CharT, _Traits>::value_type& std::basic_string_view<_CharT, _Traits>::operator[](size_type) const [with _CharT = char; _Traits = std::char_traits<char>; const_reference = const char&; size_type = long unsigned int]: Assertion '__pos < this->_M_len' failed.
/home/alpine/aports/community/opencascade/src/OCCT-7_8_1/src/MeshTest/MeshTest.cxx: In function 'Standard_Integer veriftriangles(Draw_Interpretor&, Standard_Integer, const char**)':
/home/alpine/aports/community/opencascade/src/OCCT-7_8_1/src/MeshTest/MeshTest.cxx:1045:22: warning: possibly dangling reference to a temporary [-Wdangling-reference]