Bump pyyaml from 3.10 to 5.1 in /devsecops/simplehttpserver

Bumps [pyyaml](https://github.com/yaml/pyyaml) from 3.10 to 5.1.
- [Release notes](https://github.com/yaml/pyyaml/releases)
- [Changelog](https://github.com/yaml/pyyaml/blob/master/CHANGES)
- [Commits](yaml/pyyaml@3.10...5.1)

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

devsecops/simplehttpserver/requirements.txt

@@ -23,7 +23,7 @@ python-linux-procfs==0.4.9
 pytoml==0.1.14
 pyudev==0.15
 pyxattr==0.5.1
-PyYAML==3.10
+PyYAML==5.1
 registries==0.1
 schedutils==0.4
 seobject==0.1