fix maxPruneHeightsLength

[ylsGit]

• Targeted PR against correct branch (see CONTRIBUTING.md)

• [ ] Linked to github-issue with discussion and accepted design OR link to spec that describes this work.

• [ ] Wrote tests

• [ ] Updated relevant documentation (docs/)

• [ ] Added a relevant changelog entry to the Unreleased section in CHANGELOG.md

• [ ] Reviewed Files changed in the github PR explorer

---

For Admin Use:

• Added appropriate labels to PR (ex. wip, ready-for-review, docs)
• Reviewers Assigned
• Squashed all commits, uses message "Merge PR #XYZ: [title]" (coding standards)

[codecov-commenter]

Codecov Report

Merging #3154 (019312f) into dev (d9e19ed) will decrease coverage by 0.01%. The diff coverage is n/a.

:exclamation: Current head 019312f differs from pull request most recent head 117695a. Consider uploading reports for the commit 117695a to get more accurate results

:exclamation: Your organization is not using the GitHub App Integration. As a result you may experience degraded service beginning May 15th. Please install the Github App Integration for your organization. Read more.

@@            Coverage Diff             @@
##              dev    #3154      +/-   ##
==========================================
- Coverage   36.60%   36.59%   -0.01%     
==========================================
  Files         442      442              
  Lines       46414    46414              
==========================================
- Hits        16989    16985       -4     
- Misses      28167    28169       +2     
- Partials     1258     1260       +2     

see 2 files with indirect coverage changes