Fix broken link in README (#199)

Fixed the link for "Mini-QR" and reviewed all other links in the README
for accuracy.

Co-authored-by: Bart <57799908+crypt0rr@users.noreply.github.com>

Author: SamPlaysKeys

README.md

@@ -158,7 +158,7 @@ If you would like to add your own config, you can use the [service-template](tem
 | 🔔 **Gotify**     | A simple server for sending and receiving messages in real-time.                       | [Details](services/gotify)      |
 | 📣 **ntfy**       | A simple HTTP-based pub/sub notification service for sending push notifications.       | [Details](services/ntfy)        |
 | 🚗 **LubeLogger** | Self-hosted vehicle maintenance tracker with private access.                           | [Details](services/lube-logger) |
-| 📱 **Mini-QR**    | A minimal, self-hosted QR code generator with a mobile-friendly UI.                    | [Details](services/mini-qr)     |
+| 📱 **Mini-QR**    | A minimal, self-hosted QR code generator with a mobile-friendly UI.                    | [Details](services/miniqr)     |
 | 🔐 **Hemmelig**   | A self-hosted, zero-knowledge encrypted secret sharing platform with expiring secrets. | [Details](services/hemmelig)    |
 
 ### 🍽️ Food & Wellness