fix(lantern_hnsw/build.c): index size exceeded build warning.

[wangxuqi]

For now the warning is:
WARNING: index size exceeded maintenance_work_mem during index construction, consider increasingmaintenance_work_mem

Fix it to
WARNING: index size exceeded maintenance_work_mem during index construction, consider increasing maintenance_work_mem

[greptile-apps]

PR Summary

Hi! Looks like you've reached your API usage limit. You can increase it from your account settings page here: app.greptile.com/settings/usage

_{💡 (1/5) You can manually trigger the bot by mentioning @greptileai in a comment!}

_{1 file(s) reviewed, no comment(s)
Edit PR Review Bot Settings | Greptile}

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}