AP_TECS: Fix spelling

Signed-off-by: Ryan Friedman <25047695+Ryanf55@users.noreply.github.com>

Author: Ryanf55

libraries/AP_TECS/AP_TECS.cpp

@@ -116,7 +116,7 @@ const AP_Param::GroupInfo AP_TECS::var_info[] = {
 
     // @Param: LAND_ARSPD
     // @DisplayName: Airspeed during landing approach (m/s)
-    // @Description: When performing an autonomus landing, this value is used as the goal airspeed during approach.  Max airspeed allowed is Trim Airspeed or AIRSPEED_MAX as defined by LAND_OPTIONS bitmask.  Note that this parameter is not useful if your platform does not have an airspeed sensor (use TECS_LAND_THR instead).  If negative then this value is halfway between AIRSPEED_MIN and AIRSPEED_CRUISE speed for fixed wing autolandings.
+    // @Description: When performing an autonomous landing, this value is used as the goal airspeed during approach.  Max airspeed allowed is Trim Airspeed or AIRSPEED_MAX as defined by LAND_OPTIONS bitmask.  Note that this parameter is not useful if your platform does not have an airspeed sensor (use TECS_LAND_THR instead).  If negative then this value is halfway between AIRSPEED_MIN and AIRSPEED_CRUISE speed for fixed wing autolandings.
     // @Range: -1 127
     // @Increment: 1
     // @User: Standard
@@ -197,7 +197,7 @@ const AP_Param::GroupInfo AP_TECS::var_info[] = {
 
     // @Param: LAND_SRC
     // @DisplayName: Land sink rate change
-    // @Description: When zero, the flare sink rate (TECS_LAND_SINK) is a fixed sink demand. With this enabled the flare sinkrate will increase/decrease the flare sink demand as you get further beyond the LAND waypoint. Has no effect before the waypoint. This value is added to TECS_LAND_SINK proportional to distance traveled after wp. With an increasing sink rate you can still land in a given distance if you're traveling too fast and cruise passed the land point. A positive value will force the plane to land sooner proportional to distance passed land point. A negative number will tell the plane to slowly climb allowing for a pitched-up stall landing. Recommend 0.2 as initial value.
+    // @Description: When zero, the flare sink rate (TECS_LAND_SINK) is a fixed sink demand. With this enabled the flare sink rate will increase/decrease the flare sink demand as you get further beyond the LAND waypoint. Has no effect before the waypoint. This value is added to TECS_LAND_SINK proportional to distance traveled after wp. With an increasing sink rate you can still land in a given distance if you're traveling too fast and cruise passed the land point. A positive value will force the plane to land sooner proportional to distance passed land point. A negative number will tell the plane to slowly climb allowing for a pitched-up stall landing. Recommend 0.2 as initial value.
     // @Range: -2.0 2.0
     // @Units: m/s/m
     // @Increment: 0.1
@@ -987,7 +987,7 @@ void AP_TECS::_update_pitch(void)
 
     float SPE_weighting = 2.0f - _SKE_weighting;
 
-    // either weight can fade to 0, but don't go above 1 to prevent instability if tuned at a speed weight of 1 and wieghting is varied to end points in flight.
+    // either weight can fade to 0, but don't go above 1 to prevent instability if tuned at a speed weight of 1 and weighting is varied to end points in flight.
     SPE_weighting = MIN(SPE_weighting, 1.0f);
     _SKE_weighting = MIN(_SKE_weighting, 1.0f);