fix: processWebhookMessage & chat.postMessage types #12890

Job	Run time
⚙️ Variables Setup	7s
📦 Build Packages	1m 2s
📦 Meteor Build - coverage	8m 12s
🔨 Test Unit / Unit Tests	1m 36s
🔎 Code Check / TypeScript	2m 32s
🔎 Code Check / Code Lint	8m 13s
🚢 Build Docker Images for Testing	1s
🔨 Test API (EE)	1s
🔨 Test API (CE)	1s
🔨 Test UI (EE)	1s
🚢 Build Docker Image (preview)	1s
🔨 Test UI (CE)	1s
✅ Tests Done	1s
📦 Meteor Build - official	1s
🚢 Build Docker Images for Production	1s
🚀 Publish build assets	1s
🚀 Publish Docker Image (services)	1s
🚀 Publish Docker Image (main)	1s
🚀 Notify external services	1s
trigger-dependent-workflows	1s
	21m 56s

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