ChapterNavigator: Fix rounding error when changing page with slider (#9477)

ChapterNavigator: Fix rounding error when changing page from slider

app/src/main/java/eu/kanade/presentation/reader/ChapterNavigator.kt

@@ -35,6 +35,7 @@ import androidx.compose.ui.unit.LayoutDirection
 import androidx.compose.ui.unit.dp
 import eu.kanade.presentation.util.isTabletUi
 import eu.kanade.tachiyomi.R
+import kotlin.math.roundToInt
 
 @Composable
 fun ChapterNavigator(
@@ -106,7 +107,7 @@ fun ChapterNavigator(
                             valueRange = 1f..totalPages.toFloat(),
                             steps = totalPages - 2,
                             onValueChange = {
-                                onSliderValueChange(it.toInt() - 1)
+                                onSliderValueChange(it.roundToInt() - 1)
                             },
                             interactionSource = interactionSource,
                         )