fix(deps): downgrade p-queue for CommonJS compatibility (#4348)

Co-authored-by: Jennifer Davis <sigje@google.com>

Author: angelcaamal

document-ai/package.json

@@ -15,7 +15,7 @@
   "dependencies": {
     "@google-cloud/documentai": "^8.0.0",
     "@google-cloud/storage": "^7.0.0",
-    "p-queue": "^8.0.0"
+    "p-queue": "^6.6.2"
   },
   "devDependencies": {
     "c8": "^10.0.0",