Fix typo in comments erroring out CI jobs

Every time a Gradle build runs, it throws "soft errors" where unmappable characters are found and muddies up builds, as well as potentially failing CI.

Build error shown here: https://github.com/OakvilleDynamics/2024-Robot/actions/runs/7634385549/job/20798185423

This is because "—" (em dash) is not a standard US-ASCII character (or at least not according to Gradle), and should've been replaced by a "-" (hyphen).

src/main/java/frc/robot/commands/swervedrive/drivebase/AbsoluteDrive.java

@@ -27,7 +27,7 @@ public class AbsoluteDrive extends Command {
   /**
    * Used to drive a swerve robot in full field-centric mode. vX and vY supply translation inputs,
    * where x is torwards/away from alliance wall and y is left/right. headingHorzontal and
-   * headingVertical are the Cartesian coordinates from which the robot's angle will be derived—
+   * headingVertical are the Cartesian coordinates from which the robot's angle will be derived-
    * they will be converted to a polar angle, which the robot will rotate to.
    *
    * @param swerve The swerve drivebase subsystem.

src/main/java/frc/robot/commands/swervedrive/drivebase/AbsoluteFieldDrive.java

@@ -25,7 +25,7 @@ public class AbsoluteFieldDrive extends Command {
   /**
    * Used to drive a swerve robot in full field-centric mode. vX and vY supply translation inputs,
    * where x is torwards/away from alliance wall and y is left/right. headingHorzontal and
-   * headingVertical are the Cartesian coordinates from which the robot's angle will be derived—
+   * headingVertical are the Cartesian coordinates from which the robot's angle will be derived-
    * they will be converted to a polar angle, which the robot will rotate to.
    *
    * @param swerve The swerve drivebase subsystem.