bug: Notifications via ntfy fail with "not a valid config key: disabletlsvalidation"

**Describe the bug** One of the latest updates in Argus seems to have broken notifications via Ntfy. I don't know if other kind of notifications may be impacted as well, I only use ntfy. **To Reproduce** Configure notifications as follows: ``` notify: ntfy: type: ntfy url_fields: host: ntfy.mydomain.com password: [REDACTED] topic: argus params: cache: "yes" click: '{{ service_url }}/releases/latest' priority: default scheme: https ``` Add ntfy to any monitor: ``` notify: ntfy: {} ``` Go to the webui and try to send a test notification. The following error is returned: ``` Error sending: updating config from params: not a valid config key: disabletlsvalidation (valid keys: [actions at attach cache click delay disabletls email filename firebase icon in priority scheme tags title]) x 1 ``` **Expected behavior** The notification is sent via Ntfy. **Desktop (please complete the following information):** - Version: 0.28.1