build(deps): update pyopenssl requirement from >=25.3.0 to >=26.1.0

[dependabot]

Updates the requirements on pyopenssl to permit the latest version.

Changelog

Sourced from pyopenssl's changelog.

26.1.0 (2026-04-24)

Backward-incompatible changes: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Deprecations: ^^^^^^^^^^^^^

Changes: ^^^^^^^^

• Maximum supported cryptography version is now 47.x.
• Fixed X509Name field setters to correctly pass the value length to OpenSSL. Previously, values containing NUL bytes would be silently truncated, causing a divergence between the stored ASN.1 value and the value visible from Python. Credit to BudongJW for reporting the issue. CVE-2026-40475

26.0.0 (2026-03-15)

Backward-incompatible changes: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

• Dropped support for Python 3.7.
• The minimum cryptography version is now 46.0.0.

Deprecations: ^^^^^^^^^^^^^

Changes: ^^^^^^^^

• Added support for using aws-lc instead of OpenSSL.
• Properly raise an error if a DTLS cookie callback returned a cookie longer than DTLS1_COOKIE_LENGTH bytes. Previously this would result in a buffer-overflow. Credit to dark_haxor for reporting the issue. CVE-2026-27459
• Added OpenSSL.SSL.Connection.get_group_name to determine which group name was negotiated.
• Context.set_tlsext_servername_callback now handles exceptions raised in the callback by calling sys.excepthook and returning a fatal TLS alert. Previously, exceptions were silently swallowed and the handshake would proceed as if the callback had succeeded. Credit to Leury Castillo for reporting this issue. CVE-2026-27448

25.3.0 (2025-09-16)

Backward-incompatible changes: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Deprecations: ^^^^^^^^^^^^^

Changes: ^^^^^^^^

• Maximum supported cryptography version is now 46.x.

... (truncated)

Commits

• 3be23b6 Prepare 26.1.0 release (#1495)
• e6be3fc Add note on versioning policy (#1494)
• 402177b Bump actions/upload-artifact in /.github/actions/upload-coverage (#1492)
• 08c796c Bump actions/upload-artifact from 7.0.0 to 7.0.1 (#1491)
• 12478f5 Bump pypa/gh-action-pypi-publish from 1.13.0 to 1.14.0 (#1489)
• f72218e Add +/- 1 second tolerance for clock adjustments (#1481)
• 358cbf2 Prepare for 26.0.0 release (#1487)
• a8d28e7 Bump actions/cache from 4 to 5 (#1486)
• 6fefff0 Add aws-lc compatibility to tests and CI (#1476)
• a739f96 Bump actions/download-artifact from 8.0.0 to 8.0.1 (#1485)
• Additional commits viewable in compare view