venus/docs: update vn extensions
Update to reflect below ext support:
- VK_KHR_copy_commands2
- VK_KHR_dynamic_rendering
- VK_KHR_maintenance4
- VK_EXT_4444_formats
- VK_EXT_extended_dynamic_state
- VK_EXT_extended_dynamic_state2
- VK_EXT_inline_uniform_block
- VK_EXT_image_robustness
- VK_EXT_shader_demote_to_helper_invocation
- VK_EXT_calibrated_timestamps
- VK_EXT_conditional_rendering
- VK_EXT_conservative_rasterization
- VK_EXT_custom_border_color
- VK_EXT_depth_clip_enable
- VK_EXT_image_view_min_lod
- VK_EXT_index_type_uint8
- VK_EXT_line_rasterization
- VK_EXT_physical_device_drm
- VK_EXT_provoking_vertex
- VK_EXT_robustness2
- VK_EXT_shader_stencil_export
- VK_EXT_vertex_attribute_divisor
Edited by Yiwei Zhang