use custom theme

hugo.toml

@@ -1,7 +1,7 @@
 copyright = "Chaostreff Chemnitz"
 baseURL = 'https://interfug.de/'
 languageCode = "de-de"
-theme = "ananke"
+theme = "ananke_if25"
 resourceDir = "../resources"
 
 DefaultContentLanguage = "de"
@@ -13,7 +13,7 @@ enableRobotsTXT = true
 [languages]
   [languages.de]
      contentDir = "content/de"
- 
+
     [[languages.de.menu.main]]
       identifier = "home"
       name = "Interfug 2025"
@@ -25,7 +25,7 @@ enableRobotsTXT = true
       name = "Tickets"
       url = "https://tickets.chch.it/ChCh/Interfug2025/"
       weight = 30
-    
+
     [[languages.de.menu.main]]
       identifier = "impressum"
       name = "Impressum"