calibration: update CCC minimum system offset to 250 for raven

Bug: 244622298
Test: see b/244622298
Change-Id: I9c46b8e740f0d389264dd64b866a264d65d2d122
diff --git a/uwb/UWB-calibration-ce.conf b/uwb/UWB-calibration-ce.conf
index 1117a6a..231e286 100644
--- a/uwb/UWB-calibration-ce.conf
+++ b/uwb/UWB-calibration-ce.conf
@@ -134,7 +134,7 @@
 [HAL]ant_sets.ch9.azimuth.rx_ant_set_ranging = 4
 [HAL]ant_sets.ch9.azimuth.tx_ant_set_nonranging = 8
 [HAL]ant_sets.ch9.azimuth.tx_ant_set_ranging = 8
-[HAL]minimum_system_offset_uwbtime0=120
+[HAL]minimum_system_offset_uwbtime0=250
 coex_gpio=4
 coex_delay_us=1000
 coex_margin_us=500