Bump sshd-core from 0.8.0 to 2.9.1

[dependabot[bot]]

Bumps sshd-core from 0.8.0 to 2.9.1.

Changelog

Sourced from sshd-core's changelog.

Version 2.9.0 to 2.9.1

Planned for next version

Bug fixes

• SSHD-1294 Close MinaServiceFactory instances properly

Major code re-factoring

Potential compatibility issues

Minor code helpers

Behavioral changes and enhancements

Commits

• 195c5fb [maven-release-plugin] prepare release sshd-2.9.1
• 735bc1e Fix changelog
• 58fe6f6 [maven-release-plugin] prepare for next development iteration
• 23f7bb3 [maven-release-plugin] prepare release sshd-2.9.1
• 57c6731 Prepare sshd 2.9.1 release
• dab673e Added documentation regarding CLI properties values
• 9a541c1 [SSHD-1283] Added configuration property to control whether ScpShell is enabled
• a60d3fa [SSHD-1290] ChannelAsyncOutputStream: improve logging
• 1cee186 [SSHD-1288] SFTP: fix reading files that are being written
• ee315b6 [SSHD-1289] Fix lock handling in KeyExchangeMessageHandler
• Additional commits viewable in compare view

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