Update GitHub Actions to use ZK 3.6.4

The feature in this PR requires ZK 3.6 or later, so accepting this PR
requires us to bump our minimum supported ZK version that we can test
with.

.github/workflows/maven.yaml

@@ -63,7 +63,7 @@ jobs:
         profile:
           - {name: 'unit-tests',    javaver: 17, args: 'verify -PskipQA -DskipTests=false'}
           - {name: 'qa-checks',     javaver: 17, args: 'verify javadoc:jar -Psec-bugs -DskipTests -Dspotbugs.timeout=3600000'}
-          - {name: 'compat',        javaver: 17, args: 'package -DskipTests -Dversion.hadoop=3.0.3 -Dversion.zookeeper=3.5.10'}
+          - {name: 'compat',        javaver: 17, args: 'package -DskipTests -Dversion.hadoop=3.0.3 -Dversion.zookeeper=3.6.4'}
           - {name: 'errorprone',    javaver: 17, args: 'verify -Perrorprone,skipQA'}
       fail-fast: false
     runs-on: ubuntu-latest