Bump cheroot from 8.5.2 to 8.6.0 (#1603)

* Bump cheroot from 8.5.2 to 8.6.0

Bumps [cheroot](https://github.com/cherrypy/cheroot) from 8.5.2 to 8.6.0.
- [Release notes](https://github.com/cherrypy/cheroot/releases)
- [Changelog](https://github.com/cherrypy/cheroot/blob/master/CHANGES.rst)
- [Commits](https://github.com/cherrypy/cheroot/compare/v8.5.2...v8.6.0)

---
updated-dependencies:
- dependency-name: cheroot
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

* Update cheroot==8.6.0

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: JonnyWong16 <9099342+JonnyWong16@users.noreply.github.com>

lib/cheroot/connections.pyi

@@ -0,0 +1,23 @@
+from typing import Any
+
+def prevent_socket_inheritance(sock) -> None: ...
+
+class _ThreadsafeSelector:
+    def __init__(self) -> None: ...
+    def __len__(self): ...
+    @property
+    def connections(self) -> None: ...
+    def register(self, fileobj, events, data: Any | None = ...): ...
+    def unregister(self, fileobj): ...
+    def select(self, timeout: Any | None = ...): ...
+    def close(self) -> None: ...
+
+class ConnectionManager:
+    server: Any
+    def __init__(self, server) -> None: ...
+    def put(self, conn) -> None: ...
+    def stop(self) -> None: ...
+    def run(self, expiration_interval) -> None: ...
+    def close(self) -> None: ...
+    @property
+    def can_add_keepalive_connection(self): ...