build(deps): bump pyyaml from 5.3.1 to 5.4 in /v1/backend_movies

Bumps [pyyaml](https://github.com/yaml/pyyaml) from 5.3.1 to 5.4.
- [Changelog](https://github.com/yaml/pyyaml/blob/main/CHANGES)
- [Commits](yaml/pyyaml@5.3.1...5.4)

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

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

Author: dependabot[bot]

v1/backend_movies/requirements.txt

@@ -15,7 +15,7 @@ py==1.10.0
 pymongo==3.5.1
 pytest==3.2.3
 pytz==2018.3
-PyYAML==5.3.1
+PyYAML==5.4
 six==1.11.0
 Werkzeug==0.15.3
 zope.interface==4.7.2