Updating alarms feed params does not change scheduled trigger execution

In the manifest.yml file, you can specify schedule cron jobs with trigger feeds and rules.

```yaml
actions:
import-users:
function: actions/import-user/index.js
runtime: 'nodejs:12'
triggers:
sync-users:
feed: /whisk.system/alarms/interval
inputs:
minutes: 1
rules:
sync-users-rule:
trigger: sync-users
action: import-users
```

After that you might want to update the interval to be 3 minutes instead of 1. Then `aio app deploy`. After redeployed you can check the info of `sync-users` trigger. It shows 3 minutes correctly.

```bash
{
"annotations": [
{
"key": "whisk-managed",
"value": {
...
}
},
{
"key": "feed",
"value": "/whisk.system/alarms/interval"
}
],
"limits": {},
"name": "sync-users",
"namespace": "my-namespace",
"parameters": [
{
"key": "minutes",
"value": 3
}
],
"publish": false,
"rules": {
"my-namespace/sync-users-rule": {
"action": {
"name": "import-users",
"path": "my-namespace/test-app-alarms-0.0.1"
},
"status": "active"
}
},
"updated": 1605187489818,
"version": "0.0.6"
}
```

However the trigger is still fired every minute, like it was never updated.

This could be an issue with the alarms package itself, but creating this ticket for triaging purpose.

Reproduce el comportamiento del ejemplo de manifest.yml realizando el despliegue con `aio app deploy`; después, inspecciona la información del trigger y el comportamiento del paquete alarms. Compara el intervalo indicado con la cadencia de ejecución real; se considera terminado cuando actualizar los parámetros del feed cambia el intervalo de ejecución programado o identifica claramente el componente externo alarms responsable.

Escrito por el modelo de indexación a partir del texto del issue.