Update pathvalidate requirement in /requirements

Updates the requirements on [pathvalidate](https://github.com/thombashi/pathvalidate) to permit the latest version.
- [Release notes](https://github.com/thombashi/pathvalidate/releases)
- [Commits](thombashi/pathvalidate@v2.3.0...v3.2.0)

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

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

requirements/embedded.txt

@@ -6,4 +6,4 @@
 
 dulwich>=0.20,<0.21
 giturlparse>=0.9,<0.11
-pathvalidate>=2.3,<2.6
+pathvalidate>=2.3,<3.3