chore(deps): update fastmcp requirement in /sdk

Updates the requirements on [fastmcp](https://github.com/PrefectHQ/fastmcp) to permit the latest version.
- [Release notes](https://github.com/PrefectHQ/fastmcp/releases)
- [Changelog](https://github.com/PrefectHQ/fastmcp/blob/main/docs/changelog.mdx)
- [Commits](PrefectHQ/fastmcp@v2.14.2...v3.4.2)

---
updated-dependencies:
- dependency-name: fastmcp
  dependency-version: 3.4.2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

sdk/pyproject.toml

@@ -39,7 +39,7 @@ dependencies = [
     "python-multipart>=0.0.20",
     "mcpadapt>=0.1.13",
     "mcp>=1.24.0,<1.30",
-    "fastmcp>=2.14.2,<3.0",
+    "fastmcp>=2.14.2,<4.0",
     "docker>=7.0.0",
     "kubernetes>=29.0.0",
     "tiktoken>=0.5.0",