Use @DayNightPreviews to correctly render the PinIcon in dark mode (#795)

- Fixes rendering of `-night` resources in screenshot tests by overriding the `nightMode` with `paparazzi.unsafeUpdateConfig()`.

libraries/designsystem/src/main/kotlin/io/element/android/libraries/designsystem/components/PinIcon.kt

@@ -23,11 +23,10 @@ import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import io.element.android.libraries.designsystem.R
-import io.element.android.libraries.designsystem.preview.ElementPreviewDark
-import io.element.android.libraries.designsystem.preview.ElementPreviewLight
+import io.element.android.libraries.designsystem.preview.DayNightPreviews
+import io.element.android.libraries.designsystem.preview.ElementPreview
 import io.element.android.libraries.designsystem.theme.components.Icon
 import io.element.android.libraries.theme.ElementTheme
 
@@ -50,17 +49,8 @@ fun PinIcon(
     }
 }
 
-@Preview
+@DayNightPreviews
 @Composable
-fun PinIconLightPreview() =
-    ElementPreviewLight { ContentToPreview() }
-
-@Preview
-@Composable
-fun PinIconDarkPreview() =
-    ElementPreviewDark { ContentToPreview() }
-
-@Composable
-private fun ContentToPreview() {
+fun PinIconPreview() = ElementPreview {
     PinIcon()
 }