Static DHCP leases are deleted after update

### Prerequisites

- [X] I have checked the [Wiki](https://github.com/AdguardTeam/AdGuardHome/wiki) and [Discussions](https://github.com/AdguardTeam/AdGuardHome/discussions) and found no answer

- [X] I have searched other issues and found no duplicates

- [X] I want to report a bug and not ask a question

### Operating system type

Linux, Other (please mention the version in the description)

### CPU architecture

Other (please mention in the description)

### Installation

Docker

### Setup

Other (please mention in the description)

### AdGuard Home version

v0.107.13

### Description

Version of AdGuard Home server:
v0.107.13
How did you install AdGuard Home:
Docker (adguard/adguardhome:latest)
How did you setup DNS configuration:
?
If it's a router or IoT, please write device model:
Synology DS614!play
CPU architecture:
Intel
Operating system and version:
DSM 7.1-42661 Update 4

#### What did you do?
I updated my docker image with the latest release image.

#### Expected result
The static dhcp leases are taken from the previous version like the others configurations and are not be "nulled".

#### Actual result
The static dhcp leases are empty and I have to add all static leases again.

#### Screenshots (if applicable)

#### Additional information
Perhaps when this is to difficult, than perhaps it would be nice to have an "mass export/import" for the static leases, for example **a** "textbox" where multiple macs/ips/names can be set, like
_xx:xx:xx:xx:xx:xx
192.168.xx.xxx
xxxname
yy:yy:yy:yy:yy:yy
192.168.yy.yyy
yyyname
zz:zz:zz:zz:zz:zz
192.168.zz.zzz
zzz_
and so on ;-)