Update NimBLE-Arduino requirement from ^1.4.2 to ^2.1.0

Updates the requirements on [NimBLE-Arduino](https://github.com/h2zero/NimBLE-Arduino) to permit the latest version.
- [Release notes](https://github.com/h2zero/NimBLE-Arduino/releases)
- [Commits](https://github.com/h2zero/NimBLE-Arduino/commits/267d8a69665ae29532c191438415092cfd1bf9d7)

---
updated-dependencies:
- dependency-name: NimBLE-Arduino
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -27,7 +27,7 @@
     "arduino-mqtt": "256dpi/arduino-mqtt#semver:^2.5.2",
     "ArduinoJson": "bblanchon/ArduinoJson#semver:^7.2.0",
     "pocketBME280": "angrest/pocketBME280#semver:^1.2.4",
-    "NimBLE-Arduino": "h2zero/NimBLE-Arduino#semver:^1.4.2",
+    "NimBLE-Arduino": "h2zero/NimBLE-Arduino#semver:^2.1.0",
     "Sensirion I2C SCD4x": "Sensirion/arduino-i2c-scd4x#semver:^0.4.0",
     "Sensirion Core": "Sensirion/arduino-core#semver:^0.7.1"
   }