Update docs/configuring-playbook-ntfy.md

Co-authored-by: Slavi Pantaleev <slavi@devture.com>

docs/configuring-playbook-ntfy.md

@@ -17,7 +17,7 @@ Using the [UnifiedPush](https://unifiedpush.org) standard, ntfy enables self-hos
 See the project's [documentation](https://docs.ntfy.sh/) to learn what it does and why it might be useful to you.
 
 **Notes**:
-- To make use of your ntfy installation, you need installing `ntfy` app on your device and configuring your UnifiedPush-compatible Matrix client. **Otherwise your device will not receive push notifications from the ntfy server.** Refer [this section](#usage) for details.
+- To make use of your ntfy installation, you need to install [the `ntfy` app](https://docs.ntfy.sh/subscribe/phone/) on your device and configuring your UnifiedPush-compatible Matrix client. **Otherwise your device will not receive push notifications from the ntfy server.** Refer [this section](#usage) for details.
 - This playbook focuses on setting up a ntfy server for getting it send UnifiedPush notifications to Matrix-related services that this playbook installs, while the installed server will be available for other non-Matrix apps as well like [Tusky](https://tusky.app/) and [DAVx⁵](https://www.davx5.com/). This playbook does not intend to support all of ntfy's features.
 
 The [Ansible role for ntfy](https://github.com/mother-of-all-self-hosting/ansible-role-ntfy) is developed and maintained by [the MASH (mother-of-all-self-hosting) project](https://github.com/mother-of-all-self-hosting). For details about configuring ntfy, you can check them via: