Update changelog for v6.8.0

[triarius]

v6.8.0 (2023-10-19)

Full Changelog

Changed

• Bump Agent Scaler version to v1.7.0. This updates the lambda runtime to provided.al2 from the deprecated go1.x #1236 (@HugeIRL)
  Note: depending on how you upgrade existing stacks, you may not automatically be upgraded to v1.7.0 of Buildkite Agent Scaler. See here for a work around to this known issue.
• Bump buildkite-agent to v3.56.0 #1237 (@triarius)
• Bump docker-compose to v2.22.0 #1234 (@jkburges)
• Improve logging for startup scripts on linux #1230 (@triarius)
• Wrap quotes around AWS::StackName #1238 (@n-tucker)

Fixed

• Fix rsyslog was missing from base AMI #1240 (@peter-svensson)
• Fix Service Role was missing some permissions #1192 (@philnielsen) #1233 (@triarius)
• Fix hyphens were not allowed in InstanceTypes #1228 (@nitrocode)
• Fix qemu binfmt image is pulled during instance startup #1231 (@triarius)

Internal

• Fix Windows AMI build failed #1239 (@triarius)
• Add test stack remover script #1226 (@moskyb)
• Add a step to CI to check files have been formatted with shfmt #1232 (@triarius)