docs: fix readme demo gif

README.md

@@ -1,10 +1,10 @@
 <div align="center">
   <h1>️📰 Packard</h1>
-  <img alt="GitHub Release" src="https://img.shields.io/github/v/release/troylusty/packard">
+  <img alt="Release" src="https://img.shields.io/gitea/v/release/troy/packard?gitea_url=https%3A%2F%2Fcode.troylusty.com">
   <h5>Packard is a simple RSS aggregator meant to allow you to take a quick glance at what's occurring in topics you care about.</h5>
 </div>
 
-![Demo](https://github.com/user-attachments/assets/439f34ef-5c33-4bd1-bce1-1f0fa549794f)
+![Demo](demo/demo.gif)
 
 This is my first attempt at making something with Rust so that I may learn alongside creating something that I personally find useful.
 
@@ -14,7 +14,7 @@ On NixOS you can install Packard by including it as an input in flake.nix, then
 
 ```nix
 inputs = {
-    packard.url = "github:troylusty/packard";
+    packard.url = "git+https://code.troylusty.com/troy/packard";
 };
 
 ...