feat: add adafruit-nrfutil to PlatformIO installation in release workflow

Author: MichTronics

.github/workflows/release.yml

@@ -77,7 +77,7 @@ jobs:
       - name: Install PlatformIO and esptool
         run: |
           pip install --upgrade pip
-          pip install platformio esptool
+          pip install platformio esptool adafruit-nrfutil
 
       # ── 4. Install Espressif Rust toolchain (Xtensa) or ARM target ──────
       - name: Install Espressif Rust toolchain via espup