dependencies(deps): bump canvas from 3.1.1 to 3.1.2 in /export-server

Bumps [canvas](https://github.com/Automattic/node-canvas) from 3.1.1 to 3.1.2.
- [Release notes](https://github.com/Automattic/node-canvas/releases)
- [Changelog](https://github.com/Automattic/node-canvas/blob/master/CHANGELOG.md)
- [Commits](Automattic/node-canvas@v3.1.1...v3.1.2)

---
updated-dependencies:
- dependency-name: canvas
  dependency-version: 3.1.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

export-server/package-lock.json

@@ -22,7 +22,7 @@
   "author": "Dirk Stolle <[email protected]>",
   "license": "GPL-3.0",
   "dependencies": {
-    "canvas": "^3.1.1"
+    "canvas": "^3.1.2"
   },
   "engines": {
     "node": ">=18"