Restrict turret motion so we don't over-tighten the cable

We were allowing way too much motion, which was pulling the turret cable
assembly tight.  This was getting it caught.  Stop doing that with the
new range of motion.

Change-Id: I88e67739950138d3c1a8983435daeb90ef6ce733
Signed-off-by: Austin Schuh <austin.linux@gmail.com>
diff --git a/y2020/constants.h b/y2020/constants.h
index 9dfed44..66fb79b 100644
--- a/y2020/constants.h
+++ b/y2020/constants.h
@@ -143,10 +143,10 @@
 
   static constexpr ::frc971::constants::Range kTurretRange() {
     return ::frc971::constants::Range{
-        -4.6,   // Back Hard
-        4.85,   // Front Hard
-        -4.3,   // Back Soft
-        4.7123  // Front Soft
+        -3.45,  // Back Hard
+        3.45,   // Front Hard
+        -3.3,   // Back Soft
+        3.3     // Front Soft
     };
   }