Add missing comma from license-checker.cfg

Fixes license checker presubmit.
diff --git a/license-checker.cfg b/license-checker.cfg
index 8eae353..876f158 100644
--- a/license-checker.cfg
+++ b/license-checker.cfg
@@ -21,7 +21,7 @@
                 "glslang/OSDependent/Web/glslang.*.js",

 

                 "glslang/MachineIndependent/glslang_tab.cpp",

-                "glslang/MachineIndependent/glslang_tab.cpp.h"

+                "glslang/MachineIndependent/glslang_tab.cpp.h",

 

                 "glslang/MachineIndependent/glslang_angle_tab.cpp",

                 "glslang/MachineIndependent/glslang_angle_tab.cpp.h"