Increase size of possible p2p message for unmarshaller

[kirugan]

Issue #1866

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 75.32%. Comparing base (1ae9019) to head (f3044fb).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1869 +/- ## ========================================== - Coverage 75.39% 75.32% -0.08% ========================================== Files 97 97 Lines 8333 8333 ========================================== - Hits 6283 6277 -6 - Misses 1518 1520 +2 - Partials 532 536 +4 ```

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