message: fix: added another missing duckdb_api tag
diff: @@ -61,7 +61,7 @@ public:
  void SetLimit(idx_t limit = (idx_t)-1);
  static BufferManager &GetBufferManager(ClientContext &context);
  - static BufferManager &GetBufferManager(DatabaseInstance &db);
  + DUCKDB_API static BufferManager &GetBufferManager(DatabaseInstance &db);
  idx_t GetUsedMemory() {
  return current_memory;
  