properly handling patch updates

crates/cli/src/commands/trigger.rs

@@ -254,19 +254,26 @@ async fn handle_update(
         anyhow::bail!("At least one field must be provided to update");
     }
 
+    #[derive(Serialize)]
+    #[serde(tag = "op", content = "value", rename_all = "snake_case")]
+    enum TriggerDescriptionPatch {
+        Set(String),
+        Clear,
+    }
+
     #[derive(Serialize)]
     struct UpdateTriggerRequest {
         #[serde(skip_serializing_if = "Option::is_none")]
         label: Option<String>,
         #[serde(skip_serializing_if = "Option::is_none")]
-        description: Option<String>,
+        description: Option<TriggerDescriptionPatch>,
         #[serde(skip_serializing_if = "Option::is_none")]
         enabled: Option<bool>,
     }
 
     let request = UpdateTriggerRequest {
         label,
-        description,
+        description: description.map(TriggerDescriptionPatch::Set),
         enabled,
     };