bump webpack, next, pnpm (#2666)

- Supercedes #2662
- Supercedes #2657



## Checklist

- [-] I have added
[tests](https://www.cursorless.org/docs/contributing/test-case-recorder/)
- [-] I have updated the
[docs](https://github.com/cursorless-dev/cursorless/tree/main/docs) and
[cheatsheet](https://github.com/cursorless-dev/cursorless/tree/main/cursorless-talon/src/cheatsheet)
- [x] I have not broken the cheatsheet

Author: pokey

package.json

@@ -64,6 +64,6 @@
   "engines": {
     "node": ">=18.18.2"
   },
-  "packageManager": "pnpm@9.5.0",
+  "packageManager": "pnpm@9.12.1",
   "type": "module"
 }

packages/cheatsheet-local/package.json

@@ -48,7 +48,7 @@
     "ts-loader": "9.5.1",
     "ts-node": "10.9.2",
     "typescript": "^5.5.3",
-    "webpack": "5.91.0",
+    "webpack": "5.95.0",
     "webpack-cli": "5.1.4",
     "webpack-dev-server": "5.0.4"
   },

packages/cursorless-org/package.json

@@ -17,7 +17,7 @@
     "@mdx-js/loader": "3.0.1",
     "@mdx-js/react": "3.0.1",
     "@next/mdx": "14.1.4",
-    "next": "14.1.4",
+    "next": "14.2.15",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
     "react-player": "2.15.1"