Update the alert description filter

[kenoir]

What's changing and why?

The alert description filter for "Missing required parameter: response_type" was missing the underscore, this adds it.

See the description being output in Slack:

terraform plan diff

module.auth0_log_stream_alerts.module.auth0_log_stream_alerts.module.lambda.aws_lambda_function.lambda_function will be updated in-place
  ~ resource "aws_lambda_function" "lambda_function" {
        id                             = "identity_auth0_log_stream_alerts"
      ~ last_modified                  = "2024-02-19T09:47:52.000+0000" -> (known after apply)
      ~ source_code_hash               = "MXCUFp/ZwKdgUMRnlvR0oQheEaFzTpJfyRiAunJX7cw=" -> "dBIBz3ywIXiFJhxefEB++XIV7XOXTTRif4I+Je4Bu5A="
        tags                           = {}
        # (21 unchanged attributes hidden)

        # (4 unchanged blocks hidden)
    }

Plan: 0 to add, 1 to change, 0 to destroy.

[!NOTE] This change is applied.