Update CHANGELOG.md with missing changes since last release

[MarkusPettersson98]

This PR adds missing changelog items since the last release was made in preparation of a new release.

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This change is 

[faern]

Reviewed 1 of 1 files at r1, all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @MarkusPettersson98)

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CHANGELOG.md line 20 at r1 (raw file):

### Added
- Implement `Default` for `nftnl::batch::Batch`.
- Add support for Raw payload expressions: https://github.com/mullvad/nftnl-rs/pull/52.

We usually don't link to PRs, and you do it only for one out of many additional entries here. What is the motivation for that?

If we are going to reference PRs, my opinion is that #52 would be enough. Way shorter. I have seen that format in a bunch of changelogs, but I don't think I have seen people use the full URL.

[MarkusPettersson98]

Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @faern)

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CHANGELOG.md line 20 at r1 (raw file):

Previously, faern (Linus Färnstrand) wrote…

We usually don't link to PRs, and you do it only for one out of many additional entries here. What is the motivation for that?

If we are going to reference PRs, my opinion is that #52 would be enough. Way shorter. I have seen that format in a bunch of changelogs, but I don't think I have seen people use the full URL.

It was just for context, as I didn't think this changelog entry provided did that by itself. The link could very well be removed, not providing it would align stylistically with the rest of the changelog.

As for shortening the reference: It will be rendered as #52 in GitHub's markdown renderer, so it will looks nice & neat when browsing the changelog via GitHub. And I think providing the full link is more helpful for those who want to track the change.

[faern]

Nit: This fix could be mentioned, since it does fix a bug: e51fe76 Remove expect statments from nft_set macro

Reviewed 1 of 1 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved

[MarkusPettersson98]

Good catch, it should be mentioned! Fixed

Reviewable status: 0 of 1 files reviewed, all discussions resolved (waiting on @faern)

[faern]

Reviewed 1 of 1 files at r3, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved