[BUG] Inner lists in `cuda.bindings` API reference are dropped

[leofang]

Taking NVRTC's --gpu-architecture option as example:

• This is the generated docs (by parsing Doxygen docstrings with an internal tool)

• This is the public docs (the list is too long, so I only show a portion of it)

• This is the docstring from nvrtc.h (also truncated):

 * The valid compiler options are:
 *
 *   - Compilation targets
 *     - \c --gpu-architecture=\<arch\> (\c -arch)
 * 
 *       Specify the name of the class of GPU architectures for which the
 *       input must be compiled.\n
 *       - Valid <c>\<arch\></c>s:
 *         - \c compute_50
 *         - \c compute_52
 *         - \c compute_53
 *         - \c compute_60
 *         - \c compute_61
 *         - \c compute_62
 *         - \c compute_70
 *         - \c compute_72
 *         - \c compute_75
 *         - \c compute_80
 *         - \c compute_86
 *         - \c compute_87
 *         - \c compute_89

We can see the inner lists are not parsed.