fixed typo

lupas · lupas · commit 4a1624186a3a · 2019-12-02T23:07:06.000+08:00
diff --git a/packages/docs/options/README.md b/packages/docs/options/README.md
@@ -163,7 +163,7 @@ firestore: true
 
 // or
 
-functions: {
+firestore: {
   enablePersistence: true
 }
 ```
