tljh-config set limits.cpu does not accept a float value

Bug description

Trying to set the limits.cpu configuration to a float raises a validation error.

How to reproduce

sudo tljh-config set limits.cpu 3.5

Expected behaviour

According to the documentation: https://tljh.jupyter.org/en/latest/topic/tljh-config.html#tljh-set-user-limits a float is a valid value.

Actual behaviour

Your personal set up

OS: Ubuntu 24.04.1 LTS
Version(s): (The Littlest) Jupyterhub: 5.2.1, Python: 3.12.3

Full environment

``` attrs==23.2.0 Automat==22.10.0 Babel==2.10.3 bcc==0.29.1 bcrypt==3.2.2 blinker==1.7.0 certifi==2023.11.17 chardet==5.2.0 click==8.1.6 cloud-init==24.3.1 colorama==0.4.6 command-not-found==0.3 configobj==5.0.8 constantly==23.10.4 cryptography==41.0.7 dbus-python==1.3.2 distro==1.9.0 distro-info==1.7+build1 httplib2==0.20.4 hyperlink==21.0.0 idna==3.6 incremental==22.10.0 Jinja2==3.1.2 jsonpatch==1.32 jsonpointer==2.0 jsonschema==4.10.3 launchpadlib==1.11.0 lazr.restfulclient==0.14.6 lazr.uri==1.0.6 markdown-it-py==3.0.0 MarkupSafe==2.1.5 mdurl==0.1.2 netaddr==0.8.0 netifaces==0.11.0 oauthlib==3.2.2 pexpect==4.9.0 ptyprocess==0.7.0 pyasn1==0.4.8 pyasn1-modules==0.2.8 Pygments==2.17.2 PyGObject==3.48.2 PyHamcrest==2.1.0 PyJWT==2.7.0 pyOpenSSL==23.2.0 pyparsing==3.1.1 pyrsistent==0.20.0 pyserial==3.5 python-apt==2.7.7+ubuntu3 python-debian==0.1.49+ubuntu2 python-magic==0.4.27 pytz==2024.1 PyYAML==6.0.1 requests==2.31.0 rich==13.7.1 service-identity==24.1.0 setuptools==68.1.2 six==1.16.0 sos==4.5.6 ssh-import-id==5.11 systemd-python==235 Twisted==24.3.0 typing_extensions==4.10.0 ubuntu-pro-client==8001 ufw==0.36.2 unattended-upgrades==0.1 urllib3==2.0.7 wadllib==1.3.6 wheel==0.42.0 zope.interface==6.1 ```

Configuration

```python # jupyterhub_config.py """ JupyterHub config for the littlest jupyterhub. """ import os from glob import glob from tljh import configurer from tljh.config import CONFIG_DIR, INSTALL_PREFIX, USER_ENV_PREFIX from tljh.user_creating_spawner import UserCreatingSpawner from tljh.utils import get_plugin_manager c = get_config() # noqa c.JupyterHub.spawner_class = UserCreatingSpawner c.JupyterHub.cleanup_servers = False c.JupyterHub.hub_port = 15001 c.TraefikProxy.should_start = False dynamic_conf_file_path = os.path.join(INSTALL_PREFIX, "state", "rules", "rules.toml") c.TraefikFileProviderProxy.dynamic_config_file = dynamic_conf_file_path c.JupyterHub.proxy_class = "traefik_file" c.SystemdSpawner.extra_paths = [os.path.join(USER_ENV_PREFIX, "bin")] c.SystemdSpawner.default_shell = "/bin/bash" c.SystemdSpawner.unit_name_template = "jupyter-{USERNAME}" tljh_config = configurer.load_config() configurer.apply_config(tljh_config, c) pm = get_plugin_manager() pm.hook.tljh_custom_jupyterhub_config(c=c) extra_configs = sorted(glob(os.path.join(CONFIG_DIR, "jupyterhub_config.d", "*.py"))) for ec in extra_configs: load_subconfig(ec) ```

Logs

``` Config validation error: 3.5 is not of type 'integer'. You can still apply this change without validation by re-running your command with the --no-validate flag. If you think this validation error is incorrect, please report it to https://github.com/jupyterhub/the-littlest-jupyterhub/issues. ```

jupyterhub / the-littlest-jupyterhub