chore(typing): pyright ignore pl.UInt128 (#3144)

Author: dangotbanned

narwhals/_polars/utils.py

@@ -104,7 +104,7 @@ def native_to_narwhals_dtype(  # noqa: C901, PLR0912
         return dtypes.Int16()
     if dtype == pl.Int8:
         return dtypes.Int8()
-    if hasattr(pl, "UInt128") and dtype == pl.UInt128:  # pragma: no cover
+    if hasattr(pl, "UInt128") and dtype == pl.UInt128:  # pyright: ignore[reportAttributeAccessIssue] # pragma: no cover
         # Not available for Polars pre 1.8.0
         return dtypes.UInt128()
     if dtype == pl.UInt64: