docs/GL3.txt: fix typo

Signed-off-by: Boyan Ding <boyan.j.ding@gmail.com>
Reviewed-by: Albert Freeman <albertwdfreeman@gmail.com>
diff --git a/docs/GL3.txt b/docs/GL3.txt
index b9e5321..e020deb 100644
--- a/docs/GL3.txt
+++ b/docs/GL3.txt
@@ -237,7 +237,7 @@
   GL_KHR_texture_compression_astc_ldr                  DONE (i965/gen9+)
   GL_OES_copy_image                                    not started (based on GL_ARB_copy_image, which is done for some drivers)
   GL_OES_draw_buffers_indexed                          not started
-  GL_OES_draw_elements_base_vertex                     not started (based on GL_ARB_draw_elements_base_verte, which is done for all drivers)
+  GL_OES_draw_elements_base_vertex                     not started (based on GL_ARB_draw_elements_base_vertex, which is done for all drivers)
   GL_OES_geometry_shader                               not started (based on GL_ARB_geometry_shader4, which is done for all drivers)
   GL_OES_gpu_shader5                                   not started (based on parts of GL_ARB_gpu_shader5, which is done for some drivers)
   GL_OES_primitive_bounding box                        not started