Support natural sorting on attributes in item-attributes-matrix

What's Changed

• Expose repository secret as environment variable by @JasperCraeghs in #340
• Remove note about OrderedDict in configuration documentation by @JasperCraeghs in #341
• Test support for Python 3.11 by @JasperCraeghs in #342
• Support disabling of traceability_checklist by @JasperCraeghs in #343
• Check traceability_relationship_to_string for completeness by @JasperCraeghs in #349
• Update sphinx requirement from <7.0,>=2.4.5 to >=2.4.5,<8.0 by @dependabot in #345
• Raise error when traceability_external_relationship_to_url is incomplete by @JasperCraeghs in #352
• Support natural sorting on attributes by @JasperCraeghs in #356
• Clarify error about incomplete traceability_relationship_to_string by @JasperCraeghs in #361

Full Changelog: v10.0.0...v10.1.0