Bumps [github-pages](https://github.com/github/pages-gem) and [jekyll-feed](https://github.com/jekyll/jekyll-feed). These dependencies needed to be updated together.

Updates `github-pages` from 228 to 229
- [Release notes](https://github.com/github/pages-gem/releases)
- [Commits](github/pages-gem@v228...v229)

Updates `jekyll-feed` from 0.15.1 to 0.17.0
- [Release notes](https://github.com/jekyll/jekyll-feed/releases)
- [Changelog](https://github.com/jekyll/jekyll-feed/blob/master/History.markdown)
- [Commits](jekyll/jekyll-feed@v0.15.1...v0.17.0)

---
updated-dependencies:
- dependency-name: github-pages
  dependency-type: direct:development
  update-type: version-update:semver-major
- dependency-name: jekyll-feed
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Bumps [golang.org/x/net](https://github.com/golang/net) from 0.19.0 to 0.20.0.
- [Commits](golang/net@v0.19.0...v0.20.0)

---
updated-dependencies:
- dependency-name: golang.org/x/net
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

- Rather than hard-coding the Go version in the workflow, we will use the stable and oldstable tags which today resolve to 1.22.0 and 1.21.7, but will float as Go versions change.