[fix][build] Upgrade PyYaml version to 6.0.1 (apache#20831)

Author: yaalsn

docker/pulsar/Dockerfile

@@ -81,7 +81,7 @@ RUN apt-get -y --purge autoremove \
  && apt-get clean \
  && rm -rf /var/lib/apt/lists/*
 
-RUN pip3 install pyyaml==5.4.1
+RUN pip3 install pyyaml==6.0.1
 
 # Pulsar currently writes to the below directories, assuming the default configuration.
 # Note that number 4 is the reason that pulsar components need write access to the /pulsar directory.

docker/pulsar/scripts/gen-yml-from-env.py

@@ -61,7 +61,7 @@
 conf_files = sys.argv[1:]
 
 for conf_filename in conf_files:
- conf = yaml.load(open(conf_filename))
+ conf = yaml.load(open(conf_filename), Loader=yaml.FullLoader)
 
  # update the config
  modified = False