change(/wiki/opengl): copy desc. from wikipedia

Author: Longor1996

content/wiki/opengl/index.md

@@ -7,6 +7,8 @@ categories = ["rendering"]
 tags = ["rendering", "api"]
 +++
 
+> OpenGL is a cross-platform API for hardware accelerated 2D/3D graphics.
+
 {% figure(class="float", caption="Official Logo", author="Khronos", license="CC0") %}https://upload.wikimedia.org/wikipedia/commons/thumb/2/21/OpenGL_logo.svg/320px-OpenGL_logo.svg.png{% end %}
 
 {{ stub_notice() }}