Merge branch 'bugfix/bt_fix_incorrect_handle_print' into 'master'

examples/bluetooth: Fix incorrect end handle print in the GATT client applications

See merge request idf/esp-idf!2880

diff --cc examples/bluetooth/gatt_client/main/gattc_demo.c
Simple merge

diff --cc examples/bluetooth/gatt_security_client/main/example_ble_sec_gattc_demo.c
Simple merge

diff --cc examples/bluetooth/gattc_multi_connect/main/gattc_multi_connect.c
Simple merge