[Task]: Update mheap version to include Node 24 support

[derrickaw]

What needs to happen?

1. update workflows to be node 24 compatible GoogleCloudPlatform/DataflowTemplates#3991 (comment)
2. Once mheap has a new version, fix here - .github/workflows/release-notes-labels.yml

Issue Priority

Priority: 2 (default / most normal work should be filed as P2)

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