deps: update pgvector requirement from >=0.2 to >=0.5.0

[dependabot]

Updates the requirements on pgvector to permit the latest version.

Changelog

Sourced from pgvector's changelog.

0.5.0 (2026-07-06)

• Added experimental support for type hints
• Changed vector and halfvec types to return list for Django, SQLAlchemy, SQLModel, and Peewee
• Changed vector type to return Vector object for Psycopg 3, Psycopg 2, asyncpg, and pg8000
• Removed utils package (use top-level pgvector package instead)
• Removed re-exported classes (use top-level pgvector package instead)
• Removed dependency on NumPy
• Dropped support for Python < 3.10
• Dropped support for SQLAlchemy < 2

0.4.2 (2025-12-04)

• Added support for Django 6
• Added support for str objects for bit type with SQLAlchemy

0.4.1 (2025-04-26)

• Fixed SparseVector constructor for SciPy sparse matrices

0.4.0 (2025-03-15)

• Added top-level pgvector package
• Added support for pg8000
• Added support for bytes to Bit constructor
• Changed globally option to default to False for Psycopg 2
• Changed arrays option to default to True for Psycopg 2
• Fixed equality for Vector, HalfVector, Bit, and SparseVector classes
• Fixed indices and values methods of SparseVector returning tuple instead of list in some cases
• Dropped support for Python < 3.9

0.3.6 (2024-10-26)

• Added arrays option for Psycopg 2

0.3.5 (2024-10-05)

• Added avg function with type casting to SQLAlchemy
• Added globally option for Psycopg 2

0.3.4 (2024-09-26)

• Added schema option for asyncpg

0.3.3 (2024-09-09)

• Improved support for cursor factories with Psycopg 2

0.3.2 (2024-07-17)

... (truncated)

Commits

• 60739df Version bump to 0.5.0 [skip ci]
• a810f27 Updated example [skip ci]
• 45b054c Updated example [skip ci]
• efa1442 Updated examples [skip ci]
• 780cc73 Updated example [skip ci]
• 9f0d6b9 Updated examples [skip ci]
• f6e113e Updated example [skip ci]
• dc68770 Updated readme [skip ci]
• 0c18e0a Addressed todo
• 28191fc Removed todo [skip ci]
• Additional commits viewable in compare view