build: update pnpm to v12

See associated pull request for more information.

Author: angular-robot

package.json

@@ -8,11 +8,11 @@
     "url": "https://github.com/angular/components.git"
   },
   "license": "MIT",
-  "packageManager": "pnpm@11.25.0",
+  "packageManager": "pnpm@12.4.0",
   "engines": {
     "npm": "Please use pnpm instead of NPM to install dependencies",
     "yarn": "Please use pnpm instead of Yarn to install dependencies",
-    "pnpm": "11.25.0"
+    "pnpm": "12.4.0"
   },
   "scripts": {
     "ng-dev": "node --no-warnings=ExperimentalWarning --loader ts-node/esm/transpile-only node_modules/@angular/ng-dev/bundles/cli.mjs",