build(deps): bump ooxml.js to 2.10.3

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

Author: github-actions[bot]

package.json

@@ -85,7 +85,7 @@
     "fflate": "^0.8.3",
     "markdown-codec": "^1.2.4",
     "odf.js": "^2.5.2",
-    "ooxml.js": "^2.10.2",
+    "ooxml.js": "^2.10.3",
     "pdf-codec": "^2.1.4",
     "zod": "^4.4.3"
   },