Fix typing of to_netcdf encoding (#7279)

Author: frazane

xarray/core/dataset.py

@@ -1767,7 +1767,7 @@ def to_netcdf(
         format: T_NetcdfTypes | None = None,
         group: str | None = None,
         engine: T_NetcdfEngine | None = None,
-        encoding: Mapping[Hashable, Mapping[str, Any]] | None = None,
+        encoding: Mapping[Any, Mapping[str, Any]] | None = None,
         unlimited_dims: Iterable[Hashable] | None = None,
         compute: bool = True,
         invalid_netcdf: bool = False,
@@ -1783,7 +1783,7 @@ def to_netcdf(
         format: T_NetcdfTypes | None = None,
         group: str | None = None,
         engine: T_NetcdfEngine | None = None,
-        encoding: Mapping[Hashable, Mapping[str, Any]] | None = None,
+        encoding: Mapping[Any, Mapping[str, Any]] | None = None,
         unlimited_dims: Iterable[Hashable] | None = None,
         compute: Literal[True] = True,
         invalid_netcdf: bool = False,
@@ -1799,7 +1799,7 @@ def to_netcdf(
         format: T_NetcdfTypes | None = None,
         group: str | None = None,
         engine: T_NetcdfEngine | None = None,
-        encoding: Mapping[Hashable, Mapping[str, Any]] | None = None,
+        encoding: Mapping[Any, Mapping[str, Any]] | None = None,
         unlimited_dims: Iterable[Hashable] | None = None,
         *,
         compute: Literal[False],
@@ -1814,7 +1814,7 @@ def to_netcdf(
         format: T_NetcdfTypes | None = None,
         group: str | None = None,
         engine: T_NetcdfEngine | None = None,
-        encoding: Mapping[Hashable, Mapping[str, Any]] | None = None,
+        encoding: Mapping[Any, Mapping[str, Any]] | None = None,
         unlimited_dims: Iterable[Hashable] | None = None,
         compute: bool = True,
         invalid_netcdf: bool = False,