The PostCommit Python Examples Spark job is flaky

[github-actions]

The PostCommit Python Examples Spark is failing over 50% of the time.
Please visit https://github.com/apache/beam/actions/workflows/beam_PostCommit_Python_Examples_Spark.yml?query=is%3Afailure+branch%3Amaster to see all failed workflow runs.
See also Grafana statistics: http://metrics.beam.apache.org/d/CTYdoxP4z/ga-post-commits-status?orgId=1&viewPanel=8&var-Workflow=PostCommit%20Python%20Examples%20Spark

[Abacn]

caused by #33658 updated numpy version

[tvalentyn]

Thanks for taking a look, @Amar3tto . per #33774 (comment) we might need to update one of the example

[Amar3tto]

Fixed after #33781