fix: Fix previous ledger size typo in RCLConsensus

[mvadari]

High Level Overview of Change

Title pretty much says it all

Context of Change

AI review

API Impact

N/A

[xrplf-ai-reviewer]

No issues.

Review by Claude Opus 4.6 · Prompt: V12

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 81.4%. Comparing base (2502bef) to head (5b7e017).
⚠️ Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/xrpld/app/consensus/RCLConsensus.cpp	0.0%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           develop   #6696     +/-   ##
=========================================
- Coverage     81.5%   81.4%   -0.0%     
=========================================
  Files          999     999             
  Lines        74458   74458             
  Branches      7553    7553             
=========================================
- Hits         60653   60646      -7     
- Misses       13805   13812      +7     

Files with missing lines	Coverage Δ
src/xrpld/app/consensus/RCLConsensus.cpp	59.2% <0.0%> (ø)

... and 4 files with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.