[clang] Use value instead of getValue (NFC)

clang/lib/ExtractAPI/Serialization/SymbolGraphSerializer.cpp

@@ -31,14 +31,14 @@ namespace {
 /// at position \p Key.
 void serializeObject(Object &Paren, StringRef Key, Optional<Object> Obj) {
   if (Obj)
-    Paren[Key] = std::move(Obj.getValue());
+    Paren[Key] = std::move(Obj.value());
 }
 
 /// Helper function to inject a JSON array \p Array into object \p Paren at
 /// position \p Key.
 void serializeArray(Object &Paren, StringRef Key, Optional<Array> Array) {
   if (Array)
-    Paren[Key] = std::move(Array.getValue());
+    Paren[Key] = std::move(Array.value());
 }
 
 /// Serialize a \c VersionTuple \p V with the Symbol Graph semantic version