fix: pyyaml < 6.0 because release/6.0 remove yaml.load()

python/requirements.txt

@@ -7,7 +7,7 @@ protobuf>=3.12.2
 grpcio-tools>=1.28.1
 grpcio>=1.28.1
 func-timeout>=4.3.5
-pyyaml>=1.3.0
+pyyaml>=1.3.0, <6.0
 flask>=1.1.2
 click==7.1.2
 itsdangerous==1.1.0

python/requirements_mac.txt

@@ -6,7 +6,7 @@ google>=2.0.3
 opencv-python==4.2.0.32
 protobuf>=3.12.2
 func-timeout>=4.3.5
-pyyaml>=1.3.0
+pyyaml>=1.3.0, <6.0
 flask>=1.1.2
 click==7.1.2
 itsdangerous==1.1.0