Display hours as 0-23 in /stats

src/routes/pages.rs

@@ -216,7 +216,7 @@ pub fn stats(_auth: Authorized, db: State<'_, sled::Db>) -> Result<Template, Sta
                 bars: (0..24)
                     .map(|hour| {
                         let percentage = *stats_per_hour.entry(hour).or_default();
-                        (hour + 1, percentage, 100 - percentage)
+                        (hour, percentage, 100 - percentage)
                     })
                     .collect(),
             }