message: Fix docstring of `load!` and relax types
  Calling `load!` fails due to the type restriction on `con`, probably due to confusion about `DBInterface.Connection` vs `DuckDB.Connection`. The easiest fix is to just omit the type restriction.
diff: @@ -21,11 +21,11 @@ appendDataFrame(input_df::DataFrame, db::DB, table::AbstractString, schema::Stri
  appendDataFrame(input_df, db.main_connection, table, schema)
  """
  - DuckDB.load!(input_df::DataFrame, con, table)
  + DuckDB.load!(con, input_df, table)
  -Load an input DataFrame `input_df` into a DuckDB table that will be named `table`.
  +Load an input DataFrame `input_df` into a new DuckDB table that will be named `table`.
  """
  -function load!(con::Connection, input_df::DataFrame, table::AbstractString, schema::String = "main")
  +function load!(con, input_df::DataFrame, table::AbstractString, schema::String = "main")
  register_data_frame(con, input_df, "__append_df")
  DBInterface.execute(con, "CREATE TABLE \"$schema\".\"$table\" AS SELECT * FROM __append_df")
  unregister_data_frame(con, "__append_df")
  