[clangd] NFC. Add a newline at the end of the file

Author: ilya-biryukov

clang-tools-extra/clangd/DecisionForest.cpp

@@ -95,4 +95,4 @@ evaluateDecisionForest(const SymbolQualitySignals &Quality,
 } // namespace clangd
 } // namespace clang
 
-#endif // !CLANGD_DECISION_FOREST
+#endif // !CLANGD_DECISION_FOREST