fix(packageManager): bump pnpm@11.0.8 → pnpm@11.1.2

The pnpm 11.1.2 cascade landed in external-tools.json (CI downloads
11.1.2) but the root packageManager field was still pinned at 11.0.8.
pnpm refuses to run with:

  [ERROR] This project is configured to use 11.0.8 of pnpm. Your
  current pnpm is v11.1.2

Bring packageManager in line with the installed binary.

Author: jdalton

package.json

@@ -31,7 +31,7 @@
   "engines": {
     "vscode": "^1.63.0"
   },
-  "packageManager": "pnpm@11.0.8",
+  "packageManager": "pnpm@11.1.2",
   "icon": "assets/socket-icon-brand-256.png",
   "activationEvents": [
     "workspaceContains:**/[pP][aA][cC][kK][aA][gG][eE].[jJ][sS][oO][nN]",