changed to reddit (#2876)

## Description:

fix url

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

w.o.n

src/client/components/Footer.ts

@@ -26,7 +26,7 @@ export class Footer extends LitElement {
             />
           </a>
           <a
-            href="https://www.reddit.com/r/OpenFrontIO/"
+            href="https://www.reddit.com/r/OpenFront/"
             target="_blank"
             rel="noopener noreferrer"
             class="opacity-60 hover:opacity-100 hover:scale-110 transition-all"