chore(deps): update dependency jekyll-feed to v0.17.0 (#544)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [jekyll-feed](https://togithub.com/jekyll/jekyll-feed) | `0.15.1` ->
`0.17.0` |
[![age](https://developer.mend.io/api/mc/badges/age/rubygems/jekyll-feed/0.17.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/rubygems/jekyll-feed/0.17.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/rubygems/jekyll-feed/0.15.1/0.17.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/rubygems/jekyll-feed/0.15.1/0.17.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>jekyll/jekyll-feed (jekyll-feed)</summary>

###
[`v0.17.0`](https://togithub.com/jekyll/jekyll-feed/blob/HEAD/History.markdown#0170--2022-10-14)

[Compare
Source](https://togithub.com/jekyll/jekyll-feed/compare/v0.16.0...v0.17.0)

##### Documentation

- Update CI status badge
([#&#8203;363](https://togithub.com/jekyll/jekyll-feed/issues/363))

##### Development Fixes

- Add Ruby 3.1 to the CI matrix
([#&#8203;365](https://togithub.com/jekyll/jekyll-feed/issues/365))

##### Minor Enhancements

- Allow disabling of jekyll-feed while in development
([#&#8203;370](https://togithub.com/jekyll/jekyll-feed/issues/370))

###
[`v0.16.0`](https://togithub.com/jekyll/jekyll-feed/blob/HEAD/History.markdown#0160--2022-01-03)

[Compare
Source](https://togithub.com/jekyll/jekyll-feed/compare/v0.15.1...v0.16.0)

##### Minor Enhancements

- Add support for `page.description` in front matter to become entry
`<summary>`
([#&#8203;297](https://togithub.com/jekyll/jekyll-feed/issues/297))

##### Bug Fixes

- Fold private methods into the `:render` method as local variables
([#&#8203;327](https://togithub.com/jekyll/jekyll-feed/issues/327))
- Check `post.categories` instead of `post.category`
([#&#8203;357](https://togithub.com/jekyll/jekyll-feed/issues/357))
- Switched xml_escape for `<![CDATA[]]>` for post content
([#&#8203;332](https://togithub.com/jekyll/jekyll-feed/issues/332))

##### Development Fixes

- Add Ruby 3.0 to CI
([#&#8203;337](https://togithub.com/jekyll/jekyll-feed/issues/337))
- Lock RuboCop to v1.18.x
([#&#8203;348](https://togithub.com/jekyll/jekyll-feed/issues/348))
- Add workflow to release gem via GH Action
([#&#8203;355](https://togithub.com/jekyll/jekyll-feed/issues/355))

##### Documentation

- Use `.atom` extension in documented examples since we write an Atom
feed ([#&#8203;359](https://togithub.com/jekyll/jekyll-feed/issues/359))

</details>

---

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docs/Gemfile.lock

@@ -30,7 +30,7 @@ GEM
       faraday-net_http (>= 2.0, < 3.1)
       ruby2_keywords (>= 0.0.4)
     faraday-net_http (3.0.2)
-    ffi (1.16.1)
+    ffi (1.16.2)
     forwardable-extended (2.6.0)
     gemoji (3.0.1)
     github-pages (228)