chore: bump coder/slackme/coder from 1.0.30 to 1.0.31 in /dogfood/coder (#19136)

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dogfood/coder/main.tf

@@ -264,7 +264,7 @@ data "coder_workspace_tags" "tags" {
 module "slackme" {
   count            = data.coder_workspace.me.start_count
   source           = "dev.registry.coder.com/coder/slackme/coder"
-  version          = "1.0.30"
+  version          = "1.0.31"
   agent_id         = coder_agent.dev.id
   auth_provider_id = "slack"
 }