Update CHANGES for release 11.12.0

SPIRV/GlslangToSpv.cpp

@@ -9538,7 +9538,8 @@ int GetSpirvGeneratorVersion()
     // return 7; // GLSL volatile keyword maps to both SPIR-V decorations Volatile and Coherent
     // return 8; // switch to new dead block eliminator; use OpUnreachable
     // return 9; // don't include opaque function parameters in OpEntryPoint global's operand list
-    return 10; // Generate OpFUnordNotEqual for != comparisons
+    // return 10; // Generate OpFUnordNotEqual for != comparisons
+    return 11; // Make OpEmitMeshTasksEXT a terminal instruction
 }
 
 // Write SPIR-V out to a binary file