Update revision history and contributors list

Updated revision history and contributors list for OES_get_program_binary.txt as per https://github.com/KhronosGroup/OpenGL-Registry/pull/411.
diff --git a/extensions/OES/OES_get_program_binary.txt b/extensions/OES/OES_get_program_binary.txt
index ace3deb..f484e07 100644
--- a/extensions/OES/OES_get_program_binary.txt
+++ b/extensions/OES/OES_get_program_binary.txt
@@ -10,6 +10,7 @@
 
     Acorn Pooley
     Aske Simon Christensen
+    Arthur Tombs
     David Garcia
     Georg Kolling
     Jason Green
@@ -44,8 +45,8 @@
 
 Version
 
-    Last Modified Date: January 11, 2019
-    Revision: #15
+    Last Modified Date: June 24, 2020
+    Revision: #16
 
 Number
 
@@ -416,6 +417,8 @@
 
 Revision History
 
+    #16    24/06/2020    Arthur Tombs    Fix typo: pass binaryLength by value
+                                         instead of by pointer in example code
     #15    01/11/2019    Jon Leech       Add an error for ProgramBinary if there
                                          are no binary formats (Bug 16155).
     #14    10/08/2013    Jon Leech       Change GLvoid -> void (Bug 10412).