engine: add normalized RLIMIT_NOFILE default to v25 release note

Signed-off-by: David Karlsson <[email protected]>

content/engine/release-notes/25.0.md

@@ -30,6 +30,21 @@ For a full list of pull requests and changes in this release, refer to the relev
 
 ### New
 
+- The daemon now uses systemd's default `LimitNOFILE`. In earlier versions of
+  Docker Engine, this limit was set to `infinity`. This would cause issues with
+  recent versions of systemd, where the hard limit was increased, causing
+  programs that adjusted their behaviors based on ulimits to consume a high
+  amount of memory.
+
+  The new setting makes containers behave the same way as software running on
+  the host, but may cause some software that makes incorrect assumptions based
+  on the soft-limit to misbehave. To get the previous behavior, you can set
+  `LimitNOFILE=1048576`.
+
+  This change only affects build containers created with `docker build` when
+  using BuildKit with the `docker` driver.
+  [moby/moby#45534](https://github.com/moby/moby/pull/45534)
+
 - Add OpenTelemetry tracing. [moby/moby#45652](https://github.com/moby/moby/pull/45652), [moby/moby#45579](https://github.com/moby/moby/pull/45579)
 - Add support for CDI devices under Linux. [moby/moby#45134](https://github.com/moby/moby/pull/45134), [docker/cli#4510](https://github.com/docker/cli/pull/4510), [moby/moby#46004](https://github.com/moby/moby/pull/46004)
 - Add an additional interval to be used by healthchecks during the container start period. [moby/moby#40894](https://github.com/moby/moby/pull/40894), [docker/cli#4405](https://github.com/docker/cli/pull/4405), [moby/moby#45965](https://github.com/moby/moby/pull/45965)