Merge pull request #7700 from rabbitmq/mk-3.10.20-release-notes

3.10.20 release notes

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+RabbitMQ `3.10.20` is a maintenance release in the `3.10.x` [release series](https://www.rabbitmq.com/versions.html).
+
+This series [**reaches end of community support** on July 31st, 2023](https://rabbitmq.com/versions.html).
+
+Please refer to the upgrade section from [v3.10.0 release notes](https://github.com/rabbitmq/rabbitmq-server/releases/tag/v3.10.0)
+if upgrading from a version prior to 3.10.0.
+
+This release **requires Erlang 24.3** and supports Erlang 25.
+[RabbitMQ and Erlang/OTP Compatibility Matrix](https://www.rabbitmq.com/which-erlang.html) has more details on
+Erlang version requirements for RabbitMQ.
+
+
+### Minimum Supported Erlang Version
+
+Erlang 23 and 24 versions older than 24.3 have reached [end of support](https://www.rabbitmq.com/which-erlang.html).
+
+This release of RabbitMQ [requires Erlang 24.3.4.8](https://github.com/rabbitmq/rabbitmq-packaging/pull/35)
+or later versions. Nodes **will fail to start** on older Erlang releases.
+
+Erlang 25.2 is recommended: it offers much improved performance on ARM64 architectures, [profiling with flame graphs](https://blog.rabbitmq.com/posts/2022/05/flame-graphs/)
+across all architectures, and the most recent TLS 1.3 implementation.
+
+
+## Changes Worth Mentioning
+
+Release notes can be found on GitHub at [rabbitmq-server/release-notes](https://github.com/rabbitmq/rabbitmq-server/tree/v3.10.x/release-notes).
+
+
+## Core Server
+
+### Bug Fixes
+
+ * Improved resiliency of dead-lettering.
+
+   GitHib issue: [#7677](https://github.com/rabbitmq/rabbitmq-server/pull/7677)
+
+
+## CLI Tools
+
+### Bug Fixes
+
+ * `rabbitmq-streams help [command]` now looks up stream commands correctly.
+
+   Contributed by @markus812498 (CloudAMQP).
+
+   GitHub issue: [#7657](https://github.com/rabbitmq/rabbitmq-server/pull/7657)
+
+
+### etcd Peer Discovery Plugin
+
+#### Bug Fixes
+
+ * Node key TTL setting was unintentionally ignored.
+
+   GitHub issues: [#7554](https://github.com/rabbitmq/rabbitmq-server/issues/7554)
+
+
+## Dependency Upgrades
+
+None in this release.
+
+
+## Source Code Archives
+
+To obtain source code of the entire distribution, please download the archive named `rabbitmq-server-3.10.20.tar.xz`
+instead of the source tarball produced by GitHub.