Bump sphinx from 6.2.1 to 7.1.2

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 6.2.1 to 7.1.2.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES)
- [Commits](sphinx-doc/sphinx@v6.2.1...v7.1.2)

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

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

Author: dependabot[bot]

poetry.lock

@@ -30,7 +30,7 @@ asn1crypto = "^1.4.0"
 cbor2 = "^5.4.2"
 certvalidator = "^0.11.1"
 cryptography = ">=41,<42"
-Sphinx = {version = "^6.0.0", optional = true, extras = ["docs"]}
+Sphinx = {version = ">=6,<8", optional = true, extras = ["docs"]}
 sphinx-autodoc-typehints = {version = "^1.21.0", optional = true, extras = ["docs"]}
 sphinx-rtd-theme = {version = "^1.0.0", optional = true, extras = ["docs"]}
 pyhpke = ">=0.4.2,<1.0.0"