3.9.0

• bump botocore dependency specification to support
  "botocore >= 1.43.3, < 1.43.57" (#1665, #1668, #1675)
• bump aiohttp dependency specification to support
  "aiohttp >= 3.14.0, < 4.0.0" (#1667)
• run the optional httpx backend on trio in addition to asyncio,
  via anyio primitives, so aiobotocore is usable from trio-based projects
  (closes #749) (#1667)
• prefer httpx2 — Pydantic's maintained, API-compatible fork of httpx
  — for the optional httpx backend, adding a new aiobotocore[httpx2]
  extra; the existing aiobotocore[httpx] extra keeps working but now
  installs the deprecated legacy httpx package and emits a
  DeprecationWarning when used (#1669)
• fix the release-drafting workflow silently reporting success when the
  agent never ran (#1664)