fix(deps): bump electron to 43.8.3 and undici to 7.30.1

- Pick up upstream security fixes
- Update undici override to match
- Add security changelog fragment

package.json

@@ -100,7 +100,7 @@
     "picomatch": "4.0.4",
     "tar": "7.5.21",
     "tmp": "0.2.7",
-    "undici": "7.29.1"
+    "undici": "7.30.1"
   },
   "keywords": [
     "anki",
@@ -129,12 +129,12 @@
     "@electron/asar": "3.4.1",
     "@types/node": "^24.10.0",
     "@types/ws": "^8.18.1",
-    "electron": "43.7.7",
+    "electron": "43.8.3",
     "electron-builder": "26.16.1",
     "esbuild": "^0.25.12",
     "prettier": "^3.8.1",
     "typescript": "^5.9.3",
-    "undici": "7.29.1"
+    "undici": "7.30.1"
   },
   "build": {
     "appId": "com.sudacode.SubMiner",