Apply small suggestions from code review

Further param description improvements.

Co-authored-by: Matthias Grob <maetugr@gmail.com>

src/modules/fw_rate_control/fw_rate_control_params.c

@@ -137,8 +137,7 @@ PARAM_DEFINE_FLOAT(FW_PR_P, 0.08f);
 /**
  * Pitch rate derivative gain.
  *
- * Pitch rate differential gain. Small values help reduce fast oscillations.
+ * Pitch rate differential gain.
- * If value is too big oscillations will appear again.
  *
  * @unit %/rad/s
  * @min 0.0

src/modules/vtol_att_control/standard_params.c

@@ -43,8 +43,8 @@
 /**
  * Use fixed-wing actuation in hover to accelerate forward
  *
- * This feature can be used to avoid the plane having to pitch down in order to move forward.
+ * This feature can be used to avoid the plane having to pitch nose down in order to move forward.
- * Prevents large, negative lift from pitching down into wind.
+ * Prevents large, negative lift from pitching nose down into wind.
  * Fixed-wing forward actuators refers to puller/pusher (standard VTOL), or forward-tilt (tiltrotor VTOL).
  * Only active if demanded down pitch is below VT_PITCH_MIN.
  * Use VT_FWD_THRUST_SC to tune it.

src/modules/vtol_att_control/vtol_att_control_params.c

@@ -278,7 +278,7 @@ PARAM_DEFINE_INT32(VT_FW_QC_R, 0);
  *
  * Maximum height above the ground (if available, otherwhise above
  * home if available, otherwise above the local origin) where triggering a quadchute is possible.
- * At high altitudes there is a big risk to deplete the battery and therefore crash if in quad-chuting there.
+ * At high altitudes there is a big risk to deplete the battery and therefore crash if quad-chuting there.
  *
  * @unit m
  * @min 0