peer: fix logging (missing argument) [skip ci]

[starius]

Change Description

Previously, LND log used to have such records:

[WRN] PEER: Peer(...): Link=%!v(MISSING) is not active

Now the short channel ID is printed there instead of "%!v(MISSING)".

Steps to Test

I got this message when opened a channel from a node using neutrino. I had to restart the node multiple times until the channel become active and I got this message after the first restart.

Also I found this message in the log of another node running with full bitcoin node.

Pull Request Checklist

Testing

• [ ] Your PR passes all CI checks.
• [ ] ~~Tests covering the positive and negative (error paths) are included.~~(irrelevant)
• [ ] Bug fixes contain tests triggering the bug to prevent regressions.

Code Style and Documentation

• [x] The change obeys the Code Documentation and Commenting guidelines, and lines wrap at 80.
• [x] Commits follow the Ideal Git Commit Structure.
• [ ] ~~Any new logging statements use an appropriate subsystem and logging level.~~ (irrelevant)
• [ ] ~~Any new lncli commands have appropriate tags in the comments for the rpc in the proto file.~~ (irrelevant)
• [x] There is a change description in the release notes, or [skip ci] in the commit message for small changes.

📝 Please see our Contribution Guidelines for further guidance.