ci: Update for new ruamel.yaml API

The old `safe_load` and similar PyYAML compatibility functions have been
removed from recent(-ish) versions of _ruamel.yaml_.

ci/build.sh

@@ -1,9 +1,10 @@
 python3 -m pip install --user ruamel.yaml
 python3 /dev/fd/3 < songquotes.yml > public/songquotes.json 3<<EOF
-from ruamel.yaml import safe_load as load
+from ruamel.yaml import YAML
 from json import dump
 import sys
-dump(load(sys.stdin), sys.stdout)
+yaml = YAML()
+dump(yaml.load(sys.stdin), sys.stdout)
 EOF
 
 tar -cJf dustin.web.tar.xz -C public .

ci/podTemplate.yaml

@@ -5,7 +5,7 @@ spec:
   - name: zola
     image: git.pyrocufflink.net/containerimages/zola
   - name: python
-    image: docker.io/python:3.10
+    image: docker.io/python:3
     command:
     - python
     args: