[BT] Bump NimBLE-Arduino 2.3.2 -> 2.5.0 to fix BLE scan regression on Arduino core 3.3.7+ (#2333)

The esp32_platform 55.03.39 bump (#2329) ships Arduino-ESP32 core >=3.3.7,
whose NimBLE integration enables mesh scan-filtering. NimBLE-Arduino 2.3.2
(pinned since 2025-06-28) handles this incorrectly and stops reporting
advertisements on scan restart, so continuously-scanning gateways (e.g. the
Theengs Bridge) decode nothing.

Upstream fix: h2zero/NimBLE-Arduino 98548470f "[Bugfix] Scan duplicate filter
not resetting on scan restart" (released in 2.3.9). Bumping to the latest 2.5.0
also picks up the Arduino 3.3.7 "controller invalid state" init fix (2.3.8/2.3.9)
and a scan-response timer for long-duration scans.

HIL-validated on a Theengs Bridge v11 with esp32_platform 55.03.39:
  - NimBLE 2.3.2: BLE decode 0/3
  - NimBLE 2.5.0: BLE decode 3/3, reachability 2/2, builds clean

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

platformio.ini

@@ -122,7 +122,7 @@ arduinolog = https://github.com/1technophile/Arduino-Log/archive/6d1f14a.zip
 picomqtt = PicoMQTT@1.1.1
 rc-switch = https://github.com/1technophile/rc-switch/archive/98537e9.zip
 newremoteswitch = https://github.com/1technophile/NewRemoteSwitch/archive/8eb980e.zip
-ble = https://github.com/h2zero/NimBLE-Arduino/archive/2.3.2.zip
+ble = https://github.com/h2zero/NimBLE-Arduino/archive/2.5.0.zip
 irremoteesp = https://github.com/theengs/IRremoteESP8266/archive/arduinov3.zip
 lora = https://github.com/sandeepmistry/arduino-LoRa/archive/f4a1d27.zip
 esppilight = https://github.com/theengs/ESPiLight/archive/b9dd7a1.zip