Bump AkkaVersion from 1.4.8 to 1.4.9 (#111)
Bump AkkaVersion from 1.4.8 to 1.4.9 (#111)

Bumps `AkkaVersion` from 1.4.8 to 1.4.9.

Updates `Akka` from 1.4.8 to 1.4.9
- [Release notes](https://github.com/akkadotnet/akka.net/releases)
- [Changelog](https://github.com/akkadotnet/akka.net/blob/dev/RELEASE_NOTES.md)
- [Commits](https://github.com/akkadotnet/akka.net/compare/1.4.8...1.4.9)

Updates `Akka.TestKit.Xunit2` from 1.4.8 to 1.4.9
- [Release notes](https://github.com/akkadotnet/akka.net/releases)
- [Changelog](https://github.com/akkadotnet/akka.net/blob/dev/RELEASE_NOTES.md)
- [Commits](https://github.com/akkadotnet/akka.net/compare/1.4.8...1.4.9)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>

Co-authored-by: dependabot-preview[bot] <6a4c1c4838f800d1998274cd5234e1f65c55e90c@users.noreply.github.com>
akkadotnet/Akka.Logger.Serilog,akkadotnet/Akka.Logger.Serilog