There's a merged pull request on the void-packages repository

v4l2loopback: update to 0.12.7
https://github.com/void-linux/void-packages/pull/40146

Description:
Added the following patches:
- Backported dkms-patch from Ubuntu (support for kernel >= 5.18) [1]
- Limit v4l2_loopback_write calls to (streaming) writers [2]
- Reintroduce previous behavior for write call [3]

[1] https://github.com/umlaeute/v4l2loopback/commit/e7edf2f55b7eb71b69984110f3c8e31b8ac6285e
[2] https://github.com/umlaeute/v4l2loopback/pull/477/commits
[3] https://github.com/umlaeute/v4l2loopback/pull/485/commits

#### Testing the changes
- I tested the changes in this PR: **YES**

#### Local build testing
- I built this PR locally for my native architecture, (x86_64-libc)
- I built this PR locally for these architectures (if supported. mark crossbuilds):
  - armv7l
  - i686-libc