Doc update (#3539)

* Added resize() function signature change to V3 Migration documentation

* Added towncrier note

---------

Co-authored-by: Davis Bennett <[email protected]>

Author: christine-e-smit

changes/3536.doc.md

@@ -0,0 +1 @@
+Updated 3.0 Migration Guide to include function signature change to zarr.Array.resize function.

docs/user-guide/v3_migration.md

@@ -99,6 +99,10 @@ The following sections provide details on breaking changes in Zarr-Python 3.
    Zarr specification. To continue using version 2, set `zarr_format=2` when creating arrays
    or set `default_zarr_version=2` in Zarr's runtime configuration.
 
+3. Function signature change to [`zarr.Array.resize`][] - the `resize` function now takes a
+   `zarr.core.common.ShapeLike` input rather than separate arguments for each dimension.
+   Use `resize((10,10))` in place of `resize(10,10)`.
+
 ### The Group class
 
 1. Disallow direct construction - use [`zarr.open_group`][] or [`zarr.create_group`][]