reduce dram0_0 usage by lowering OFFLINE_QUEUE_SIZE

some older ESP32 boards were pushing the limits of the dram segment causing the linker to fail, especially for ble and wifi firmwares.

lowering OFFLINE_QUEUE_SIZE reduces dram usage

variants/lilygo_tbeam_SX1276/platformio.ini

@@ -41,7 +41,7 @@ build_flags =
   -D MAX_GROUP_CHANNELS=8
   -D BLE_PIN_CODE=123456
 ;  -D BLE_DEBUG_LOGGING=1
-  -D OFFLINE_QUEUE_SIZE=256
+  -D OFFLINE_QUEUE_SIZE=128
 ;  -D RADIOLIB_DEBUG_BASIC=1
 ;  -D MESH_PACKET_LOGGING=1
 ;  -D MESH_DEBUG=1