mod: bump neutrino dependency

[ziggie1984]

Updates github.com/lightninglabs/neutrino from v0.16.2 to v0.16.3-0.20260508212153-0f87fa7c4b36, the latest upstream master commit.

Verification:

• go test ./chainntnfs/neutrinonotify ./blockcache ./discovery
• go test -p 1 ./lnwallet/btcwallet ./routing/chainview

Note: the first full targeted run hit a stale local rpctest port lock; after removing the stale lock, the affected packages passed.

[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request performs a routine dependency update for the neutrino library to track the latest upstream master commit. The change ensures the project benefits from the most recent improvements and fixes provided by the neutrino maintainers, with verified test coverage to ensure no regressions were introduced.

Highlights

• Dependency Update: Updated the github.com/lightninglabs/neutrino dependency from v0.16.2 to v0.16.3-0.20260508212153-0f87fa7c4b36.
• Verification: Confirmed stability through targeted test runs across chainntnfs, blockcache, discovery, lnwallet, and routing packages.

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[gemini-code-assist]

Code Review

This pull request updates the github.com/lightninglabs/neutrino dependency from version v0.16.2 to a specific commit-based version v0.16.3-0.20260508212153-0f87fa7c4b36. I have no feedback to provide.

[saubyk]

Ack

[github-actions]

PR Severity: MEDIUM. Automated classification: 3 files (2 non-generated), 5 lines changed. Files: go.mod (dependency update, medium), sample-lnd.conf (config sample, medium), go.sum (auto-generated, excluded). No critical or high packages touched. No severity bump conditions triggered. To override, add a severity-override label. <!-- pr-severity-bot -->

[yyforyongyu]

LGTM ⛵