Update workflow

Author: h2zero

.github/workflows/build.yml

@@ -70,8 +70,7 @@ jobs:
           - generic_nrf52840
           - adafruit_feather_nrf52840
         nimble_version:
-          - release/1.4
-          - master
+          - release/2.3
         include:
           - example: "example/lib/examples/Bluetooth_5/NimBLE_extended_server"
             flags: build_flags = '-DCONFIG_BT_NIMBLE_EXT_ADV=1'
@@ -113,7 +112,7 @@ jobs:
         run: |
           cat > example/platformio.ini << EOF
             [env]
-            platform = https://github.com/h2zero/platform-n-able.git@^1.0.0
+            platform = https://github.com/h2zero/platform-n-able.git
             platform_packages = framework-n-able-arduino @ file://./framework
             framework = arduino
             ${{ matrix.flags }}