Bump filelock from 3.20.3 to 4.2.1

Bumps [filelock](https://github.com/tox-dev/filelock) from 3.20.3 to 4.2.1.
- [Release notes](https://github.com/tox-dev/filelock/releases)
- [Changelog](https://github.com/tox-dev/filelock/blob/main/docs/changelog.rst)
- [Commits](https://github.com/tox-dev/filelock/compare/3.20.3...4.2.1)

---
updated-dependencies:
- dependency-name: filelock
  dependency-version: 4.2.1
  dependency-type: indirect
...

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

uv.lock

@@ -329,11 +329,11 @@ wheels = [
 
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@@ -1449,16 +1461,18 @@ wheels = [
 
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     { name = "filelock" },
+    { name = "packaging" },
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