Fix workflows again

Author: mosuem

.github/workflows/args.yaml

@@ -4,13 +4,23 @@ on:
   # Run CI on pushes to the main branch, and on PRs against main.
   push:
     branches: [ main ]
+    paths:
+      - '.github/workflows/args.yaml'
+      - 'pkgs/args/**'
   pull_request:
     branches: [ main ]
+    paths:
+      - '.github/workflows/args.yaml'
+      - 'pkgs/args/**'
   schedule:
     - cron: "0 0 * * 0"
 env:
   PUB_ENVIRONMENT: bot.github
 
+defaults:
+  run:
+    working-directory: pkgs/args/
+
 jobs:
   # Check code formatting and static analysis on a single OS (linux)
   # against Dart dev.