fix(deps): update dependency fastapi to v0.138.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
fastapi (changelog)	==0.137.2 → ==0.138.0

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Release Notes

fastapi/fastapi (fastapi)

v0.138.0

Compare Source

Features

• ✨ Add support for app.frontend("/", directory="dist") and router.frontend("/", directory="dist"). PR #​15800 by @​tiangolo.
  • Read the docs: Frontend.

Docs

• 📝 Fix typo in release notes. PR #​15807 by @​tiangolo.
• 📝 Add app.frontend() instructions to Agent Library Skill. PR #​15805 by @​tiangolo.
• 📝 Update release notes link. PR #​15802 by @​tiangolo.
• ✏️ Update white space characters in bigger apps. PR #​15801 by @​tiangolo.
• ✏️ Fix grammar, typos, and broken links in docs. PR #​15694 by @​YuriiMotov.

Translations

• 🌐 Enable Hindi docs translations. PR #​15554 by @​YuriiMotov.

Internal

• 🐛 Fix failing test, update format for raised errors. PR #​15804 by @​tiangolo.
• 👷 Fix test-alls-green. PR #​15803 by @​tiangolo.
• 🔧 Enable checking release-notes.md for typos. PR #​15796 by @​YuriiMotov.
• 📝 Tweak wording about deploying to FastAPI Cloud. PR #​15793 by @​tiangolo.
• 🔨 Use gpt-5.5 model in translate.py, specify -chat to avoid warnings. PR #​15792 by @​YuriiMotov.

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