chore: prepare release v3.1.0 (#267)

Author: kangasta

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [3.1.0] - 2023-11-06
+
 ### Added
 
 - Add `network_peerings`, `ntp_excess_gib`, `storage_maxiops` and `load_balancers` fields to `account show` outputs.
@@ -306,7 +308,8 @@ Initial public beta release :tada:
 ### Added
 - Current feature set added! First internal release
 
-[Unreleased]: https://github.com/UpCloudLtd/upcloud-cli/compare/v3.0.0...HEAD
+[Unreleased]: https://github.com/UpCloudLtd/upcloud-cli/compare/v3.1.0...HEAD
+[3.1.0]: https://github.com/UpCloudLtd/upcloud-cli/compare/v3.0.0...v3.1.0
 [3.0.0]: https://github.com/UpCloudLtd/upcloud-cli/compare/v2.10.0...v3.0.0
 [2.10.0]: https://github.com/UpCloudLtd/upcloud-cli/compare/v2.9.1...v2.10.0
 [2.9.1]: https://github.com/UpCloudLtd/upcloud-cli/compare/v2.9.0...v2.9.1