Bump pyrefly from 0.36.2 to 0.39.4 (#537)

Bumps [pyrefly](https://github.com/facebook/pyrefly) from 0.36.2 to 0.39.4.
- [Release notes](https://github.com/facebook/pyrefly/releases)
- [Commits](facebook/pyrefly@0.36.2...0.39.4)

---
updated-dependencies:
- dependency-name: pyrefly
  dependency-version: 0.39.4
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pyproject.toml

@@ -51,7 +51,7 @@ dev = [
     "mypy == 1.18.2",
     "ufmt == 2.8.0",
     "usort == 1.0.8.post1",
-    "pyrefly == 0.36.2",
+    "pyrefly == 0.39.4",
 ]
 lsp = [
     "pygls[ws] ~= 1.3.1",