doc: forgot to list the new OVR_multiivew entrypoints in the table.

doc/opengl-mapping.dox

@@ -168,6 +168,7 @@ OpenGL function                         | Matching API
 @fn_gl2{FramebufferTexture1D,FramebufferTexture}, \n `glFramebufferTexture2D()` | @ref GL::Framebuffer::attachTexture(), \n @ref GL::Framebuffer::attachCubeMapTexture()
 @fn_gl2{FramebufferTexture3D,FramebufferTexture} | not used, @fn_gl{FramebufferTextureLayer} has more complete features
 @fn_gl{FramebufferTextureLayer}, \n `glNamedFramebufferTextureLayer()` | @ref GL::Framebuffer::attachTextureLayer(), \n @ref GL::Framebuffer::attachCubeMapTexture()
+@fn_gl_extension{FramebufferTextureMultiview,OVR,multiview} | |
 @fn_gl{FrontFace}                       | @ref GL::Renderer::setFrontFace()
 
 @subsection opengl-mapping-functions-g G