Adjust signs for turret and catapult outputs

These sign conventions will be easier to use, and match what is being
assumed in the controllers.

Change-Id: Ia4d5feec697ea544160f15a04bf1d2564ccbea4d
Signed-off-by: Austin Schuh <austin.linux@gmail.com>
diff --git a/y2022/control_loops/superstructure/superstructure_output.fbs b/y2022/control_loops/superstructure/superstructure_output.fbs
index a9935e0..7fa390f 100644
--- a/y2022/control_loops/superstructure/superstructure_output.fbs
+++ b/y2022/control_loops/superstructure/superstructure_output.fbs
@@ -6,11 +6,12 @@
     climber_voltage:double (id: 0);
 
     // Voltage of the catapult falcon
-    // Positive rotates counterclockwise parallel to the motor shaft
+    // Positive lifts the catapult to fire.
     catapult_voltage:double (id: 1);
 
     // Voltage of the turret falcon
-    // Positive rotates counterclockwise from a bird's eye view
+    // Positive rotates the turret around the Z axis (up) according to the
+    // right hand rule.
     turret_voltage:double (id: 2);
 }