docs(shell): update example to include Encoding usage in `Command::spawn` (#3183)

* docs(shell): update example to include Encoding usage in `Command::spawn`

* docs(shell): update patch level to minor for Encoding usage in `Command::spawn` documentation

* Update .changes/doc-to-Encoding-usage-in-shell.md

Co-authored-by: Tony <68118705+Legend-Master@users.noreply.github.com>

* docs(shell): update examples to demonstrate manual Encoding usage in command output

* Update plugins/shell/src/process/mod.rs

Co-authored-by: Tony <68118705+Legend-Master@users.noreply.github.com>

* docs(shell): update example to use 'windows-1252' encoding in command output

* Update plugins/shell/src/process/mod.rs

Co-authored-by: Tony <68118705+Legend-Master@users.noreply.github.com>

* docs(shell): update example command in documentation to use 'some-program' with 'some-arg'

* Bump shell-js in change file

* Fix indent