Include integration docs for NIA with consul-terraform-sync label (hashicorp#8926)

Author: findkim

.github/pr-labeler.yml

@@ -34,6 +34,7 @@ theme/connect:
 # theme/consul-nomad:
 theme/consul-terraform-sync:
     - website/pages/docs/nia/**/*
+    - website/pages/docs/integrate/nia*
 # theme/consul-vault:
 theme/contributing:
     - .github/**/*