ci(typos): make warn-only (continue-on-error: true)

Surface spelling findings without blocking CI on existing baseline.
Lychee was already warn-only; this aligns typos with the same posture.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: claude

.github/workflows/typos.yml

@@ -16,3 +16,4 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: crate-ci/typos@v1.30.0
+        continue-on-error: true  # warn-only — surface findings without blocking CI