Update dependency fastapi to v0.138.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
fastapi (changelog)	0.138.0 → 0.138.1

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Release Notes

fastapi/fastapi (fastapi)

v0.138.1

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Refactors

• ♻️ Refactor Library Skills, make info easier to find for agents. PR #​15841 by @​tiangolo.

Internal

• 👷 Simplify pull request workflow triggers. PR #​15836 by @​tiangolo.
• 👷 Update issue-manager to 0.7.1. PR #​15833 by @​tiangolo.
• ⬆️ Update issue-manager to 0.7.0. PR #​15831 by @​tiangolo.
• 🔧 Update sponsors: Add TestMu again. PR #​15830 by @​tiangolo.
• 🔒️ Update zizmor workflow security checks. PR #​15820 by @​tiangolo.
• ⬆ Bump pydantic-settings from 2.14.1 to 2.14.2. PR #​15799 by @​dependabot[bot].

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