"failed to sufficiently increase send buffer size" log error even though UDP buffer size was increased to ~2.5MB in /etc/sysctl.conf

### 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

x86

### Installation

GitHub releases or script from README

### Setup

On a router, DHCP is handled by the router

### AdGuard Home version

v0.107.31

### Description

#### What did you do?
Upgraded container to v.107.31 (this started happening at the prior version v0.107.30). It does not happen in v0.107.29.

I had edited my `/etc/sysctl.conf` to add the line `net.core.rmem_max=2500000` to allocate ~2.5MB of buffer

#### Expected result
No `failed to sufficiently increase send buffer size` error

#### Actual result
`failed to sufficiently increase send buffer size` error

#### Additional information

This started happening on all my adguardhome instances:

- Debian 11
- Ubuntu 20.04
- RPI Debian 11 64 bit

Rolling back to v0.107.29 fixes the issue