plugin release notes

docs/notes/2.22.x.md

@@ -84,6 +84,8 @@ Setting [the `orphan_files_behaviour = "ignore"` option](https://www.pantsbuild.
 
 The `PythonToolRequirementsBase` and `PythonToolBase` classes now have a new `help_short` field. Subclasses should now use `help_short` instead of the `help` field. The `help` field will be automatically generated using `help_short`, and will include the tool's default package version and provide instructions on how to override this version using a custom lockfile.
 
+The process execution intrinsic rule in Rust now contains support for "in workspace" execution. This is local execution from within the repository itself without using an execution sandbox. `ProcessExecutionEnvironment`'s constructor has a new `execute_in_workspace` parameter which enables workspace execution.
+
 ## Full Changelog
 
 For the full changelog, see the individual GitHub Releases for this series: https://github.com/pantsbuild/pants/releases