chore(ci): add 'connrefused' and 'Dockerfiles' to cspell dictionary

Adding NX_NO_CLOUD to .circleci/config.yml brought that file into Cspell's
changed-file scope, exposing two legit technical terms: 'Dockerfiles' (new
comment) and the pre-existing 'connrefused' (from a --retry-connrefused curl
flag). Both added to .cspell.json.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: evereq

.cspell.json

@@ -3,6 +3,8 @@
 	"language": "en",
 	"$schema": "https://raw.githubusercontent.com/streetsidesoftware/cspell/main/cspell.schema.json",
 	"words": [
+		"connrefused",
+		"Dockerfiles",
 		"activepieces",
 		"ActivePieces",
 		"activitywatch",