Improve font loading error message

app/src/main/java/io/xpipe/app/core/AppFont.java

@@ -62,7 +62,7 @@ public class AppFont {
         try {
             Font.getDefault();
         } catch (Throwable t) {
-            throw new IllegalStateException("Font loading is not working. Check whether your system is properly configured with fontconfig", t);
+            throw new IllegalStateException("Unable to load any fonts. Check whether your system is properly configured with fontconfig", t);
         }
     }