Update dependency electron to v29 (#3373)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

tools/dicom-web-electron/package-lock.json

@@ -27,7 +27,7 @@
   "author": "Microsoft",
   "license": "ISC",
   "devDependencies": {
-    "electron": "^28.0.0",
+    "electron": "^29.0.0",
     "electron-builder": "^24.4.0",
     "ansi-regex": ">=6.0.1",
     "async": ">=3.2.4"