fix(add-copybara-credential-store): don't log credentials file step

Change-Id: I9ad3b182fb93f4b6b4a09415a82798a16280eed5
diff --git a/roles/add-copybara-credential-store/tasks/main.yaml b/roles/add-copybara-credential-store/tasks/main.yaml
index f42e75e..1db44c3 100644
--- a/roles/add-copybara-credential-store/tasks/main.yaml
+++ b/roles/add-copybara-credential-store/tasks/main.yaml
@@ -2,3 +2,4 @@
   ansible.builtin.template:
     src: "git-credentials.j2"
     dest: "{{ filename }}"
+    no_log: True