Use word `changelogs` in code

[HonkingGoose]

Describe the proposed change(s).

Use the word changelogs in our code instead of release notes. I'll let somebody else refactor the code.

Describe why we need/want these change(s).

Follow-up after discussion #23109. Right now we use changelogs and release notes. We decided to use the word changelogs.

Related issue:

• 23140

[RahulGautamSingh]

Do we intend to also,?

1. rename the config options like fetchReleaseNotes
2. change the pr body section Release Notes to Change logs

[rarkins]

It's Changelog or Changelogs with no space and yes we should probably aim to be as consistent with that as possible

[HonkingGoose]

I just found a possible complication: there are release notes but also a CHANGELOG file. 🙃

Dependabot shows two separate expandable sections: one for Release notes and one for Changelog.

• https://github.com/HonkingGoose/git-gosling/pull/594

Dependabot says what's the source of the text:

// Dependabot message about Releases

<p><em>Sourced from <a href="https://github.com/squidfunk/mkdocs-material/releases">mkdocs-material's releases</a>.</em></p>

// Dependabot text about Changelog file

<p><em>Sourced from <a href="https://github.com/squidfunk/mkdocs-material/blob/master/CHANGELOG">mkdocs-material's changelog</a>.</em></p>

I just wanted to mention this whole thing, so you can think about ways to prevent confusion later down the line. 😄