renamed 'sta_to_eth' example to 'sta2eth'

examples/network/.build-test-rules.yml

@@ -17,6 +17,6 @@ examples/network/simple_sniffer:
       temporary: true
       reason: lack of runners
 
-examples/network/sta_to_eth:
+examples/network/sta2eth:
   disable:
     - if: SOC_WIFI_SUPPORTED != 1

examples/network/sta2eth/main/CMakeLists.txt

@@ -10,7 +10,7 @@ else()
     set(wired_iface usb_ncm_iface.c)
 endif()
 
-idf_component_register(SRCS sta_to_eth_main.c
+idf_component_register(SRCS sta2eth_main.c
                             ${wired_iface}
                             ${config_method}
                        INCLUDE_DIRS "")