mod: color alpha

`withOpacity` -> `withValues`

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/common/widgets/network_img_layer.dart

@@ -114,7 +114,10 @@ class NetworkImgLayer extends StatelessWidget {
       height: height,
       clipBehavior: Clip.antiAlias,
       decoration: BoxDecoration(
-        color: Theme.of(context).colorScheme.onInverseSurface.withOpacity(0.4),
+        color: Theme.of(context)
+            .colorScheme
+            .onInverseSurface
+            .withValues(alpha: 0.4),
         borderRadius: BorderRadius.circular(type == 'avatar'
             ? 50
             : type == 'emote'