Bump pyyaml from 5.3.1 to 5.4 in /deploy

Bumps [pyyaml](https://github.com/yaml/pyyaml) from 5.3.1 to 5.4.
- [Release notes](https://github.com/yaml/pyyaml/releases)
- [Changelog](https://github.com/yaml/pyyaml/blob/master/CHANGES)
- [Commits](https://github.com/yaml/pyyaml/compare/5.3.1...5.4)

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

deploy/requirements.txt

@@ -63,7 +63,7 @@ python-docx==0.8.10
 python-editor==1.0.4
 python-levenshtein==0.12.0
 pytz==2020.4
-pyyaml==5.3.1
+pyyaml==5.4
 recommonmark==0.6.0
 requests==2.25.0
 sentry-sdk==0.14.4