dumps: update the mediawiki image used
In future, we will be using the image tag that is automatically generated from the fetch_job_pod_spec tasks.
Until then, we manually hard-code this mediawiki image tag and update it as necessary.
Bug: T390067
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In future, we will be using the image tag that is automatically generated from the fetch_job_pod_spec tasks.
Until then, we manually hard-code this mediawiki image tag and update it as necessary.
Bug: T390067