Nest some more namespaces

Did someone previously suggest that all namespace had been
nested?  Silly.

Signed-off-by: Stephan Pleines <pleines.stephan@gmail.com>
Change-Id: I22278c1caaeba8b47dc46fb2ed3078c20a11e190
diff --git a/y2022/actors/auto_splines.h b/y2022/actors/auto_splines.h
index 2f5c399..42760e5 100644
--- a/y2022/actors/auto_splines.h
+++ b/y2022/actors/auto_splines.h
@@ -13,8 +13,7 @@
 
 */
 
-namespace y2022 {
-namespace actors {
+namespace y2022::actors {
 
 class AutonomousSplines {
  public:
@@ -73,7 +72,6 @@
   aos::FlatbufferDetachedBuffer<frc971::MultiSpline> spline_two2_;
 };
 
-}  // namespace actors
-}  // namespace y2022
+}  // namespace y2022::actors
 
 #endif  // Y2022_ACTORS_AUTO_SPLINES_H_