build(deps): update winrt-windows-foundation-collections requirement

Updates the requirements on [winrt-windows-foundation-collections](https://github.com/pywinrt/pywinrt) to permit the latest version.
- [Release notes](https://github.com/pywinrt/pywinrt/releases)
- [Changelog](https://github.com/pywinrt/pywinrt/blob/main/CHANGELOG.md)
- [Commits](pywinrt/pywinrt@v1.0.0-beta.1...v2.1.0)

---
updated-dependencies:
- dependency-name: winrt-windows-foundation-collections
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

setup.py

@@ -6,7 +6,7 @@
     "winrt-runtime<=2.0.1",
     "winrt-Windows.Data.Xml.Dom<=2.0.1",
     "winrt-Windows.Foundation<=2.0.1",
-    "winrt-Windows.Foundation.Collections<=2.0.1",
+    "winrt-Windows.Foundation.Collections<=2.1.0",
     "winrt-Windows.UI.Notifications<=2.0.1",
 ]