build: fix postinstall for windows (angular#22720)

PR Close angular#22720

Author: ocombe

package.json

@@ -21,7 +21,7 @@
     "prebuildifier": "bazel build --noshow_progress @com_github_bazelbuild_buildtools//buildifier",
     "buildifier": "find . -type f \\( -name BUILD -or -name BUILD.bazel \\) ! -path \"*/node_modules/*\" | xargs $(bazel info bazel-bin)/external/com_github_bazelbuild_buildtools/buildifier/buildifier",
     "preinstall": "node tools/yarn/check-yarn.js",
-    "postinstall": "yarn update-webdriver; node ./tools/postinstall-patches.js",
+    "postinstall": "yarn update-webdriver && node ./tools/postinstall-patches.js",
     "update-webdriver": "webdriver-manager update --gecko false $CHROMEDRIVER_VERSION_ARG",
     "check-env": "gulp check-env"
   },