fix(deps): update dependency httpx to >=0.28.1,<0.29

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
httpx (changelog)	>=0.27.2,<0.28 -> >=0.28.1,<0.29

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Release Notes

encode/httpx (httpx)

v0.28.1

Compare Source

• Fix SSL case where verify=False together with client side certificates.

v0.28.0

Compare Source

The 0.28 release includes a limited set of deprecations.

Deprecations:

We are working towards a simplified SSL configuration API.

For users of the standard verify=True or verify=False cases, or verify=<ssl_context> case this should require no changes. The following cases have been deprecated...

• The verify argument as a string argument is now deprecated and will raise warnings.
• The cert argument is now deprecated and will raise warnings.

Our revised SSL documentation covers how to implement the same behaviour with a more constrained API.

The following changes are also included:

• The deprecated proxies argument has now been removed.
• The deprecated app argument has now been removed.
• JSON request bodies use a compact representation. (#​3363)
• Review URL percent escape sets, based on WHATWG spec. (#​3371, #​3373)
• Ensure certifi and httpcore are only imported if required. (#​3377)
• Treat socks5h as a valid proxy scheme. (#​3178)
• Cleanup Request() method signature in line with client.request() and httpx.request(). (#​3378)

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[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: uv.lock

Command failed: uv lock --upgrade-package httpx
Using CPython 3.13.1 interpreter at: /opt/containerbase/tools/python/3.13.1/bin/python3
  × No solution found when resolving dependencies:
  ╰─▶ Because only the following versions of httpx[socks] are available:
          httpx[socks]<=0.28.1
          httpx[socks]>0.29
      and litellm==1.59.8 depends on httpx>=0.23.0,<0.28.0, we can conclude
      that litellm==1.59.8 and httpx[socks]>=0.28.1 are incompatible.
      And because only litellm<=1.59.8 is available, we can conclude that
      litellm>=1.59.8 and httpx[socks]>=0.28.1 are incompatible.
      And because your project depends on httpx[socks]>=0.28.1 and
      litellm>=1.59.8, we can conclude that your project's requirements are
      unsatisfiable.

[github-actions]

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