feat: Add windows arm64 python toolchains (bazel-contrib#3062)

The changelog for astral-sh/python-build-standalone release 20250630
says:

  * Add ARM64 Windows builds for Python 3.11+

Lets use them!  This is helpful when using rules_python on arm64 windows

Work towards bazel-contrib#2276

---------

Signed-off-by: Austin Schuh <[email protected]>
Co-authored-by: Ignas Anikevicius <[email protected]>

Author: AustinSchuh

CHANGELOG.md

@@ -60,12 +60,12 @@ END_UNRELEASED_TEMPLATE
 * (gazelle) Types for exposed members of `python.ParserOutput` are now all public.
 * (gazelle) Removed the requirement for `__init__.py`, `__main__.py`, or `__test__.py` files to be
   present in a directory to generate a `BUILD.bazel` file.
-* (toolchain) Updated the following toolchains to build 20250612 to patch CVE-2025-47273:
+* (toolchain) Updated the following toolchains to build 20250702 to patch CVE-2025-47273:
     * 3.9.23
     * 3.10.18
     * 3.11.13
     * 3.12.11
-    * 3.14.0b2
+    * 3.14.0b3
 * (toolchain) Python 3.13 now references 3.13.5
 
 {#v0-0-0-fixed}
@@ -91,6 +91,11 @@ END_UNRELEASED_TEMPLATE
 * (gazelle) New directive `gazelle:python_generate_pyi_deps`; when `true`,
   dependencies added to satisfy type-only imports (`if TYPE_CHECKING`) and type
   stub packages are added to `pyi_deps` instead of `deps`.
+* (toolchain) Add toolchains for aarch64 windows for
+    * 3.11.13
+    * 3.12.11
+    * 3.13.5
+    * 3.14.0b3
 
 {#v0-0-0-removed}
 ### Removed