Docs: added extraneous link to Getting Started section.

backends/imgui_impl_allegro5.h

backends/imgui_impl_android.h

backends/imgui_impl_dx10.h

backends/imgui_impl_dx11.h

backends/imgui_impl_dx12.h

backends/imgui_impl_dx9.h

backends/imgui_impl_glfw.h

backends/imgui_impl_glut.h

backends/imgui_impl_metal.h

backends/imgui_impl_opengl2.h

backends/imgui_impl_opengl3.h

backends/imgui_impl_osx.h

backends/imgui_impl_sdl2.h

backends/imgui_impl_sdl3.h

backends/imgui_impl_sdlrenderer2.h

backends/imgui_impl_sdlrenderer3.h

backends/imgui_impl_vulkan.h

backends/imgui_impl_wgpu.h

backends/imgui_impl_win32.h