Add changelog entry about system physical requirements

CHANGELOG.md

@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+### Added
+
+- Add system physical requirements, but do not warn (which requires to make
+  syscalls). (#26937)
+
 ### Fixed
 
 - Broken environment variable in default sbws config. To use envvar $FOO, write