doc: hey, this bug was about ES, not desktop GL.

doc/changelog.dox

@@ -605,8 +605,9 @@ See also:
     coordinates), @ref MeshTools::compile() should be using only the first set
     but it wasn't.
 -   @ref Shaders::MeshVisualizerGL3D "Shaders::MeshVisualizerGL*D" shader
-    compilation failed with missing @glsl gl_PrimitiveID @ce due to GLSL 3.20
-    not being properly used for the @glsl #version @ce directive
+    compilation failed on OpenGL ES 3.2 with missing @glsl gl_PrimitiveID @ce
+    due to GLSL ES 3.20 not being properly used for the @glsl #version @ce
+    directive
 -   @ref Shaders::PhongGL was normalizing light direction in vertex shader,
     causing the fragment-interpolated direction being incorrect with visible
     artifacts on long polygons under low light angle