add it back as v4

Author: msimerson

.github/workflows/ci.yml

@@ -31,7 +31,7 @@ jobs:
           NODE_ENV: cov
 
       - name: codecov
-        uses: codecov/codecov-action
+        uses: codecov/codecov-action@v4
 
       - name: Coveralls
         uses: coverallsapp/github-action@master