build(deps): bump odf.js to 2.6.8

Triggered instantly via repository_dispatch when odf.js published its own release,
rather than waiting for the next scheduled Dependabot scan.

Author: github-actions[bot]

package.json

@@ -110,7 +110,7 @@
     "husky": "^9.1.7",
     "ink-testing-library": "^4.0.0",
     "lint-staged": "^17.3.0",
-    "odf.js": "^2.6.4",
+    "odf.js": "^2.6.8",
     "pdf-codec": "^2.0.0",
     "publint": "^0.3.22",
     "semantic-release": "^25.0.8",