Add EXPERIMENTAL_SCURVE to AGC test

buildroot/share/tests/SAMD51_grandcentral_m4-tests

@@ -32,7 +32,7 @@ opt_enable ENDSTOP_INTERRUPTS_FEATURE S_CURVE_ACCELERATION BLTOUCH Z_MIN_PROBE_R
            LONG_FILENAME_HOST_SUPPORT SCROLL_LONG_FILENAMES BABYSTEPPING DOUBLECLICK_FOR_Z_BABYSTEPPING \
            MOVE_Z_WHEN_IDLE BABYSTEP_ZPROBE_OFFSET BABYSTEP_ZPROBE_GFX_OVERLAY \
            LIN_ADVANCE ADVANCED_PAUSE_FEATURE PARK_HEAD_ON_PAUSE MONITOR_DRIVER_STATUS SENSORLESS_HOMING \
-           SQUARE_WAVE_STEPPING TMC_DEBUG
+           SQUARE_WAVE_STEPPING TMC_DEBUG EXPERIMENTAL_SCURVE
 exec_test $1 $2 "Build Grand Central M4 Default Configuration"
 
 # clean up