Add altitude zeroing

Signed-off-by: Maxwell Henderson <mxwhenderson@gmail.com>
Change-Id: I5623efb67ab95dcc60547428c6a0988378aab817
diff --git a/y2024/wpilib_interface.cc b/y2024/wpilib_interface.cc
index 3d0b7a5..2cd4672 100644
--- a/y2024/wpilib_interface.cc
+++ b/y2024/wpilib_interface.cc
@@ -94,7 +94,7 @@
 }
 
 double altitude_pot_translate(double voltage) {
-  return voltage * Values::kAltitudePotRadiansPerVolt();
+  return -1 * voltage * Values::kAltitudePotRadiansPerVolt();
 }
 
 double drivetrain_velocity_translate(double in) {