fix field name in example (#442)

preved911 · tarokkk · web-flow · commit 4125b46d34a1 · 2020-04-18T13:54:05.000+02:00
Co-authored-by: Sándor Guba &lt;gubasanyi@gmail.com&gt;
diff --git a/docs/plugins/filters/parser.md b/docs/plugins/filters/parser.md
@@ -47,7 +47,7 @@ metadata:
   name: demo-flow
 spec:
   filters:
-    - parse:
+    - parser:
         remove_key_name_field: true
         reserve_data: true
         parse:
