fix: increase timeout from 30 to 180

[rllola]

Describe your changes

Closes #2662

This change increase the timeout of the broadcaster from 30 to 180 seconds. In the last upgrade of the Shielded Expedition some validators couldn't restart their node because of the timeout. Increasing this value solved it and avoid restarting from scratch.

Indicate on which release or other PRs this topic is based on

Checklist before merging to draft

• I have added a changelog
• Git history is in acceptable state

[codecov]

Codecov Report

Attention: 5 lines in your changes are missing coverage. Please review.

Comparison is base (c733be2) 53.38% compared to head (d593759) 53.37%.

Files	Patch %	Lines
crates/apps/src/lib/node/ledger/broadcaster.rs	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2668      +/-   ##
==========================================
- Coverage   53.38%   53.37%   -0.01%     
==========================================
  Files         302      302              
  Lines      103403   103407       +4     
==========================================
- Hits        55198    55194       -4     
- Misses      48205    48213       +8     

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[Fraccaman]

thanks @rllola! I've added some minor changes and fixed the changelog. Ill merge it next release!