Update .selfcheck_suppressions

Author: chrchr-github

.selfcheck_suppressions

@@ -16,6 +16,8 @@ functionStatic:*/ui_fileview.h
 valueFlowBailout
 valueFlowBailoutIncompleteVar
 autoNoType
+# ticket 11631
+templateInstantiation:test/testutils.cpp
 
 naming-varname:externals/simplecpp/simplecpp.h
 naming-privateMemberVariable:externals/simplecpp/simplecpp.h
@@ -32,4 +34,4 @@ functionStatic:externals/tinyxml2/tinyxml2.h
 invalidPrintfArgType_uint:externals/tinyxml2/tinyxml2.cpp
 funcArgNamesDifferent:externals/tinyxml2/tinyxml2.cpp
 nullPointerRedundantCheck:externals/tinyxml2/tinyxml2.cpp
-knownConditionTrueFalse:externals/tinyxml2/tinyxml2.cpp
+knownConditionTrueFalse:externals/tinyxml2/tinyxml2.cpp