Fixes a tiny typo :)

reimertz · web-flow · commit e01a09bd8497 · 2019-03-20T00:07:39.000+01:00
diff --git a/docs/firestore.md b/docs/firestore.md
@@ -45,7 +45,7 @@ const createStoreWithFirebase = compose(
 
 // Add firebase and firestore to reducers
 const rootReducer = combineReducers({
-  firebase: firebaseStateReducer,
+  firebase: firebaseReducer,
   firestore: firestoreReducer
 })
 
