docs: update read_key() filepath -> filename

dimitryzub · web-flow · commit c95bd64a5cd0 · 2022-04-15T11:19:49.000+03:00
diff --git a/README.md b/README.md
@@ -50,7 +50,7 @@ explicitly call `read_key()` with a custom path.  See below:
 
 ```python
 import nasdaqdatalink
-nasdaqdatalink.read_key(filepath="/data/.corporatenasdaqdatalinkapikey")
+nasdaqdatalink.read_key(filename="/data/.corporatenasdaqdatalinkapikey")
 ```
 
 ## Retrieving Data
