Merge pull request #264 from gnl21/demote-ext-tag

Add EXT tag to capability to DemoteToHelperInvocationEXT
diff --git a/include/spirv/unified1/spirv.core.grammar.json b/include/spirv/unified1/spirv.core.grammar.json
index 8b98770..f45ddb1 100644
--- a/include/spirv/unified1/spirv.core.grammar.json
+++ b/include/spirv/unified1/spirv.core.grammar.json
@@ -5029,7 +5029,7 @@
       "opname" : "OpDemoteToHelperInvocationEXT",
       "class"  : "Control-Flow",
       "opcode" : 5380,
-      "capabilities" : [ "DemoteToHelperInvocation" ],
+      "capabilities" : [ "DemoteToHelperInvocationEXT" ],
       "version" : "1.6"
     },
     {