Fix namespace nesting in y2024

Signed-off-by: Maxwell Henderson <mxwhenderson@gmail.com>
Change-Id: If886abc4cfe72cb3ea768aaf9d924f0e8c76f02b
diff --git a/y2024/autonomous/auto_splines.h b/y2024/autonomous/auto_splines.h
index efdfb33..309222f 100644
--- a/y2024/autonomous/auto_splines.h
+++ b/y2024/autonomous/auto_splines.h
@@ -13,8 +13,7 @@
 
 */
 
-namespace y2024 {
-namespace autonomous {
+namespace y2024::autonomous {
 
 class AutonomousSplines {
  public:
@@ -39,7 +38,6 @@
   aos::FlatbufferDetachedBuffer<frc971::MultiSpline> test_spline_;
 };
 
-}  // namespace autonomous
-}  // namespace y2024
+}  // namespace y2024::autonomous
 
 #endif  // Y2024_AUTONOMOUS_AUTO_SPLINES_H_