chore(deps): bump sphinx from 5.3.0 to 7.1.2 in /docs

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 5.3.0 to 7.1.2.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/v7.1.2/CHANGES)
- [Commits](sphinx-doc/sphinx@v5.3.0...v7.1.2)

---
updated-dependencies:
- dependency-name: sphinx
  dependency-version: 7.1.2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

docs/poetry.lock

@@ -8,7 +8,7 @@ license = "BSD"
 [tool.poetry.dependencies]
 python = "^3.8"
 sphinx-rtd-theme = "^1.1.1"
-Sphinx = "^5"
+Sphinx = "^7"
 scaleway-core = { path = "../scaleway-core", develop = true }
 scaleway = { path = "../scaleway", develop = true }
 scaleway-async = { path = "../scaleway-async", develop = true }