build(deps): update pyyaml requirement from ~=5.4 to ~=6.0

Updates the requirements on [pyyaml](https://github.com/yaml/pyyaml) to permit the latest version.
- [Release notes](https://github.com/yaml/pyyaml/releases)
- [Changelog](https://github.com/yaml/pyyaml/blob/master/CHANGES)
- [Commits](yaml/pyyaml@5.4...6.0)

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

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

_building/building-requirements.txt

@@ -2,6 +2,6 @@
 
 semantic_version~=2.8
 jinja2~=3.0
-PyYAML~=5.4
+PyYAML~=6.0
 
 sphinx~=4.3