fixed typo

tasks/download_files.yml

diff --git a/tasks/download_files.yml b/tasks/download_files.yml
index c3520cf..85dc6f6 100644
--- a/tasks/download_files.yml
+++ b/tasks/download_files.yml
@@ -1,5 +1,5 @@
 ---
-- name: Validate that we a download_folder
+- name: Validate that we have a download_folder
   fail:
     msg: "Please specify a local download folder: -e download_folder=<local download folder>"
   when: download_folder is not defined