Bump elementpath from 5.1.0 to 5.1.1

Bumps [elementpath](https://github.com/sissaschool/elementpath) from 5.1.0 to 5.1.1.
- [Release notes](https://github.com/sissaschool/elementpath/releases)
- [Changelog](https://github.com/sissaschool/elementpath/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/sissaschool/elementpath/compare/v5.1.0...v5.1.1)

---
updated-dependencies:
- dependency-name: elementpath
  dependency-version: 5.1.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements.txt

@@ -70,7 +70,7 @@ lxml >=4.8.0,!=5.2.0,!=5.2.1,<7
 
 # XPath 2.0-3.1 support - 4.2.0 had issues, 4.1.5 stable
 # Consider updating to latest stable version periodically
-elementpath==5.1.0
+elementpath==5.1.1
 
 # For fast image comparison in screenshot change detection
 # opencv-python-headless is OPTIONAL (excluded from requirements.txt)