Update dependency starlette to v0.38.6 - autoclosed

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
starlette (changelog)	0.38.0 -> 0.38.6

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Release Notes

encode/starlette (starlette)

v0.38.6: Version 0.38.6

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Fixed

• Close unclosed MemoryObjectReceiveStream in TestClient #​2693.

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Full Changelog: encode/starlette@0.38.5...0.38.6

v0.38.5: Version 0.38.5

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Fixed

• Schedule BackgroundTasks from within BaseHTTPMiddleware #​2688.
  This behavior was removed in 0.38.3, and is now restored.

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Full Changelog: encode/starlette@0.38.4...0.38.5

v0.38.4: Version 0.38.4

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Fixed

• Ensure accurate root_path removal in get_route_path function #​2600

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Full Changelog: encode/starlette@0.38.3...0.38.4

v0.38.3: Version 0.38.3

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Added

• Support for Python 3.13 #​2662.

Fixed

• Don't poll for disconnects in BaseHTTPMiddleware via StreamingResponse #​2620.

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Full Changelog: encode/starlette@0.38.2...0.38.3

v0.38.2: Version 0.38.2

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Fixed

• Fix routing.get_name() not to assume all routines have __name__ #​2648

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Full Changelog: encode/starlette@0.38.1...0.38.2

v0.38.1: Version 0.38.1

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Removed

• Revert "Add support for ASGI pathsend extension" #​2649.

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Full Changelog: encode/starlette@0.38.0...0.38.1

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