fix pwm_out,dshot: set _num_outputs to 5 for mode_pwm5

src/drivers/dshot/dshot.cpp

@@ -403,7 +403,7 @@ DShotOutput::set_mode(Mode mode)
 		/* default output rates */
 		_output_mask = 0x1f;
 		_outputs_initialized = false;
-		_num_outputs = 4;
+		_num_outputs = 5;
 
 		break;
 

src/drivers/pwm_out/PWMOut.cpp

@@ -213,7 +213,7 @@ int PWMOut::set_mode(Mode mode)
 		_pwm_alt_rate_channels = 0;
 		_pwm_mask = 0x1f;
 		_pwm_initialized = false;
-		_num_outputs = 4;
+		_num_outputs = 5;
 
 		break;