[ci] Fix baseline workflow YAML — literal block was terminated early [update-visual-baselines]

The multi-line git commit message inside the run block dropped below the
literal block's indentation, ending the block mid-command and failing the
whole workflow file at parse time (0s failure, no jobs). Use two -m flags on
one shell line instead. YAML now validated locally before push.

Token included so this push performs the regeneration.

Co-Authored-By: Claude Fable 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01LHH3wPBsoruwCaJo8Rpf6a

.github/workflows/update-visual-baselines.yml

@@ -89,8 +89,7 @@ jobs:
           git config user.name "github-actions[bot]"
           git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
           git add tests/visual/baselines.json
-          git commit -m "test(visual): regenerate baselines on ubuntu-latest
-
-Captured by the update-visual-baselines workflow so the baseline environment
-matches the visual-regression job that compares against them."
+          git commit \
+            -m "test(visual): regenerate baselines on ubuntu-latest" \
+            -m "Captured by the update-visual-baselines workflow so the baseline environment matches the visual-regression job that compares against them."
           git push