samples: fast_pair: locator_tag: Align Bluetooth buffer sizes

Align the CONFIG_BT_BUF_ACL_RX_SIZE with new default value set by
the CONFIG_NCS_SAMPLE_MCUMGR_BT_OTA_DFU_SPEEDUP.

Jira: NCSDK-35623

Signed-off-by: Marek Pieta <[email protected]>

Author: MarekPieta

samples/bluetooth/fast_pair/locator_tag/sysbuild/common/dfu_speedup_fragment.conf

@@ -9,5 +9,5 @@ CONFIG_NCS_SAMPLE_MCUMGR_BT_OTA_DFU_SPEEDUP=y
 # Needs to be set explicitly as the CONFIG_NCS_SAMPLE_MCUMGR_BT_OTA_DFU_SPEEDUP
 # only sets the defaults which are overwritten by the prj.conf file
 CONFIG_BT_BUF_ACL_TX_SIZE=251
-CONFIG_BT_BUF_ACL_RX_SIZE=502
+CONFIG_BT_BUF_ACL_RX_SIZE=251
 CONFIG_BT_CTLR_DATA_LENGTH_MAX=251