Tracking issue for release notes of #135536: Add more impls of PartialEq and PartialOrd for strings

This issue tracks the release notes text for #135536.

Steps

• Proposed text is drafted by PR author (or team) making the noteworthy change.
• Issue is nominated for release team review of clarity for wider audience.
• Release team includes text in release notes/blog posts.

Release notes text

The responsible team for the underlying change should edit this section to replace the automatically generated link with a succinct description of what changed, drawing upon text proposed by the author (either in discussion or through direct editing).

# Libraries
- [Add more impls of `PartialEq` and `PartialOrd` for strings and different levels of references](https://github.com/rust-lang/rust/pull/135536). These impls make more cases of comparisons work, and provide more robustness against future inference issues when adding more impls in the future.

Release blog section

If the change is notable enough for inclusion in the blog post, the responsible team should add content to this section.
Otherwise leave it empty.

cc @joshtriplett -- origin issue/PR authors and assignees for starting to draft text

Start by reading the release notes text and checklist in this issue, then confirm the underlying change in PR #135536 if context is needed. Done means the release team has reviewed the wording and included it in the appropriate release notes or blog posts, or left the blog section empty when it is not notable.