Fix Monolog changes due to Magento2 2.4.8 Upgrade

[brosenberger]

• Fixes method signature of monolog plugin for monolog/monolog depencency >v3 (updated constraint from magento2 v2.4.8 upgrade)
• updates monolog dependency to >=v3

[indykoning]

While this change is very much needed, we'd hate to drop support Magento <2.4.8 immediately.

I'm thinking of removing the monolog preference, and moving it to a monolog handler instead. So we're more update proof.
As so far the only breakages we've gotten in a while have been in the monolog package.

I haven't had the time to work on it, but it looks promising
https://github.com/Seldaek/monolog/blob/2e97231b969e0ffdeff03329b808945b4ba55e38/src/Monolog/Logger.php#L391
https://github.com/Seldaek/monolog/blob/2e97231b969e0ffdeff03329b808945b4ba55e38/src/Monolog/Logger.php#L207
https://github.com/magento/magento2/blob/7bb4ca90206f166e85624e6c66edf823767749e9/app/etc/di.xml#L270
https://github.com/Seldaek/monolog/blob/main/doc/01-usage.md#core-concepts

[indykoning]

Could you check if: #165 works for you? Or what might be needed to help that be compatible with both?

Since we're not dealing with types in a handler it should be compatible with both

[indykoning]

Release 4.0.0 just dropped which adds Magento 2.4.8 support without having to drop support for 2.4.7 just yet.

If there are any issues with it feel free to let us know or make another PR 🙂