doorbell does not revert to false
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**Describe The Problem:**
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the MQTT msg for doorbell ring sets to true when there is a press, but it never reverts to false

**To Reproduce:**
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right the doorbell
**Logs:**
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N/A
```
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**Homebridge Configuration:**

```json
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N/A
**Screenshots:**
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N/A
**Environment:**

* **Homebridge Version:** <!-- homebridge -V -->
v1.2.3
* **Node Version:** <!-- node -v -->
v14.15.3
* **Homebridge-UniFi-Protect Plugin Version:**
v0.4.2
* **UniFi Protect Controller Version:**
1.17.0.b.10
* **UniFi Protect Controller Type:** <!-- UCKgen2+, UDMP, UNVR -->
UDMPRO 1.8.4-3
* **Apple Device and iOS / macOS / iPadOS / tvOS Version:**<!-- Type of Apple device you're using and associated OS version -->
N/A
* **Operating System and OS Version:** <!-- Raspbian / Ubuntu / Debian / Windows / macOS / Docker -->
Docker
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