[v0.20.x-branch] Backport #10940: Add public key for gijswijs

[github-actions]

Backport of #10940

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[github-actions]

Please cherry-pick the changes locally and resolve any conflicts.

git fetch origin backport-10940-to-v0.20.x-branch
git worktree add --checkout .worktree/backport-10940-to-v0.20.x-branch backport-10940-to-v0.20.x-branch
cd .worktree/backport-10940-to-v0.20.x-branch
git reset --hard HEAD^
git cherry-pick -x 74102ae633caf5f9d83274d52f7c184cc0259052
git push --force-with-lease

[github-actions]

🟢 PR Severity: LOW

file paths | 2 files | 52 lines changed

🟢 Low (2 files)

• scripts/keys/gijswijs.asc - new PGP public key added under scripts/, no runtime code impact
• scripts/verify-install.sh - single-line modification to a release verification helper script

Analysis

Both changed files live under scripts/*, which is categorized as best-effort review (docs/scripts/tooling). The change adds a contributor's PGP key and registers it in the install-verification script — a small, low-risk, non-functional-code change. No wallet, channel, HTLC, networking, or database code is touched, and the change is far below the file-count/line-count thresholds that would trigger a severity bump.

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_{To override, add a severity-override-{critical,high,medium,low} label.}

[ziggie1984]

LGTM (previous range conflict was due to George's key (#11052) not being on 20.x branch as well, which is now also backported and therefore this change has not merge conflict anymore.