AST: Rename SpecializeAttr::getSpecializedSgnature()

lib/Serialization/Serialization.cpp

@@ -2356,7 +2356,7 @@ class Serializer::DeclSerializer : public DeclVisitor<DeclSerializer> {
           S.Out, S.ScratchRecord, abbrCode,
           (unsigned)SA->isExported(),
           (unsigned)SA->getSpecializationKind(),
-          S.addGenericSignatureRef(SA->getSpecializedSgnature()));
+          S.addGenericSignatureRef(SA->getSpecializedSignature()));
       return;
     }