Fix typo in "PID tuning.md"

docs/PID tuning.md

@@ -88,7 +88,7 @@ affecting yaw, roll or pitch rotation rates (which are tuned by the dedicated ro
 settings).
 
 In Angle mode, this controller uses the LEVEL "P" PID setting to decide how strong the auto-level correction should
-be. Note that the default value for P_Level is 90.  This is more than likely too high of a value for most, and will cause the model to be very unstable in Angle Mode, and could result in loss of control.  It is recommended to change this value to 20 before using PID Controller 2 in Angle Mode.
+be. Note that the default value for P_Level is 90.  This is more than likely too high of a value for most, and will cause the model to be very unstable in Angle Mode, and could result in loss of control.  It is recommended to change this value to 20 before using PID Controller 1 in Angle Mode.
 
 In Horizon mode, this controller uses the LEVEL "I" PID setting to decide how much auto-level correction should be
 applied. The default Cleanflight setting for "I" will result in virtually no auto-leveling being applied, so that will
@@ -150,7 +150,7 @@ For the ALIENWII32 targets the gyroscale is removed for more yaw authority. This
 
 PID Controller 5 is an port of the PID controller from the Harakiri firmware.
 
-The algorithm is leveraging more floating point math. This PID controller also compensates for different looptimes on roll and pitch. It likely don�t need retuning of the PID values when looptime is changing. Actually there are two settings hardcoded which are configurable via the GUI in Harakiri:
+The algorithm is leveraging more floating point math. This PID controller also compensates for different looptimes on roll and pitch. It likely don't need retuning of the PID values when looptime is changing. Actually there are two settings hardcoded which are configurable via the GUI in Harakiri:
 
         OLD_YAW 0 // [0/1] 0 = multiwii 2.3 yaw, 1 = older yaw.
         MAIN_CUT_HZ 12.0f // (default 12Hz, Range 1-50Hz)