Bump egor-tensin/cleanup-path from 3 to 4

Bumps [egor-tensin/cleanup-path](https://github.com/egor-tensin/cleanup-path) from 3 to 4.
- [Release notes](https://github.com/egor-tensin/cleanup-path/releases)
- [Commits](egor-tensin/cleanup-path@v3...v4)

---
updated-dependencies:
- dependency-name: egor-tensin/cleanup-path
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/cygwin.yml

@@ -26,7 +26,7 @@ jobs:
             key: ${{ runner.os }}-${{ hashFiles('pyproject.toml') }} 
 
         - name: Set Windows PATH
-          uses: egor-tensin/cleanup-path@v3
+          uses: egor-tensin/cleanup-path@v4
           with:
             dirs: 'C:\tools\cygwin\bin;C:\tools\cygwin\lib\lapack'
         - name: Verify that bash is Cygwin bash