fix compilation error in wifi variants due to not enough ram

variants/heltec_v2/platformio.ini

@@ -178,7 +178,7 @@ build_flags =
   ${Heltec_lora32_v2.build_flags}
   -I examples/companion_radio/ui-new
   -D DISPLAY_CLASS=SSD1306Display
-  -D MAX_CONTACTS=160
+  -D MAX_CONTACTS=100
   -D MAX_GROUP_CHANNELS=8
   -D WIFI_DEBUG_LOGGING=1
   -D WIFI_SSID='"myssid"'

variants/lilygo_tlora_v2_1/platformio.ini

@@ -131,7 +131,7 @@ extends = LilyGo_TLora_V2_1_1_6
 build_flags =
   ${LilyGo_TLora_V2_1_1_6.build_flags}
   -I examples/companion_radio/ui-new
-  -D MAX_CONTACTS=160
+  -D MAX_CONTACTS=100
   -D MAX_GROUP_CHANNELS=8
   -D WIFI_SSID='"ssid"'
   -D WIFI_PWD='"password"'