Add to mlflow/ path

Author: seneyu

.github/workflows/mlflow-js.yaml

@@ -1,7 +1,8 @@
 name: mlflow
 on:
   push:
-    branches: [stephany/github-actions-3]
+    paths:
+      - 'mlflow/**'
 jobs:
   build:
     runs-on: ubuntu-latest