mapi: Fixes check_table.cpp for DrawArraysInstancedARB and DrawElementsInstancedARB

mapi: Fixes check_table.cpp for DrawArraysInstancedARB and DrawElementsInstancedARB

The compile error when compiled with "-Dglx=xlib -D shared-glapi=disabled":
check_table.cpp:1133:37: error: ‘struct _glapi_table’ has no member named ‘DrawArraysInstancedARB’; did you mean ‘DrawArraysInstanced’?
 1133 |    { "glDrawArraysInstancedARB", _O(DrawArraysInstancedARB) },

Fixes: 5679ef99b82 ("glapi: remove EXT and ARB suffixes from Draw functions")

Reviewed-by: Eric Engestrom <eric@igalia.com>
Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23793>