Bump cm-chessboard from 8.12.11 to 8.12.12 in /client in the chess group

Bumps the chess group in /client with 1 update: [cm-chessboard](https://github.com/shaack/cm-chessboard).


Updates `cm-chessboard` from 8.12.11 to 8.12.12
- [Commits](https://github.com/shaack/cm-chessboard/commits)

---
updated-dependencies:
- dependency-name: cm-chessboard
  dependency-version: 8.12.12
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: chess
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

client/package-lock.json

@@ -75,7 +75,7 @@
     "@tsparticles/slim": "^3.9.1",
     "chart.js": "^4.5.1",
     "cm-chess": "^3.6.3",
-    "cm-chessboard": "^8.12.11",
+    "cm-chessboard": "^8.12.12",
     "date-fns": "^4.4.0",
     "exceljs": "^4.4.0",
     "file-saver": "^2.0.5",