Update zdcPbPb.json

[cpuggion84]

Add paramiter CENTRAL_EVENT_CONFIG with values 2.5 and 1 This parameter is used to fill the histograms relating to the centroid conditioned by the cut on the zems. This configuration was already present in the zdc.json configuration file used for oxygen and neon. Now, it has also been added for PbPb.

[github-actions]

REQUEST FOR PRODUCTION RELEASES:
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+async-label <label1>, <label2>, !<label3> ...

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The following labels are available
async-2023-pbpb-apass4
async-2023-pp-apass4
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async-2024-PbPb-apass1
async-2024-ppRef-apass1
async-2024-PbPb-apass2
async-2023-PbPb-apass5

[cpuggion84]

The correct label for this pull request should be async-2025-PbPb-cpass0, but it doesn't exist
what label can I put?

[jackal1-66]

Tagging @alcaliva for the DPG