Update httpx requirement from ^0.25.2 to ^0.26.0

Updates the requirements on [httpx](https://github.com/encode/httpx) to permit the latest version.
- [Release notes](https://github.com/encode/httpx/releases)
- [Changelog](https://github.com/encode/httpx/blob/master/CHANGELOG.md)
- [Commits](encode/httpx@0.25.2...0.26.0)

---
updated-dependencies:
- dependency-name: httpx
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

pyproject.toml

@@ -27,7 +27,7 @@ python = ">=3.11,<4.0"
 importlib-metadata = {version = "^4.0", python = "<3.8"}
 python-dotenv = "^1.0.0"
 plotly = "^5.18.0"
-httpx = "^0.25.2"
+httpx = "^0.26.0"
 
 [tool.poetry.group.doc] # Optional documentation dependencies
 optional = true