fix(linq): read triggerApiKey in webhook deleteSubscription

deleteSubscription still read config.apiKey after the credential rename, so
undeploy would skip the DELETE and orphan the Linq subscription. Match
createSubscription's triggerApiKey key.

Author: waleedlatif1

apps/sim/lib/webhooks/providers/linq.ts

@@ -232,7 +232,7 @@ export const linqHandler: WebhookProviderHandler = {
     const { webhook, requestId } = ctx
     try {
       const config = getProviderConfig(webhook)
-      const apiKey = config.apiKey as string | undefined
+      const apiKey = config.triggerApiKey as string | undefined
       const externalId = config.externalId as string | undefined
 
       if (!apiKey || !externalId) {