RenovateBot: Update dependency types-PyYAML to v6.0.12.20240311

requirements-test.txt

 openapi-spec-validator==0.7.1
 types-Flask==1.1.6
 types-Jinja2==2.11.9
-types-PyYAML==6.0.12.12
+types-PyYAML==6.0.12.20240311
 wheel==0.42.0
 coverage==7.4.3
 Flask-Testing==0.8.1
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