build(docs-infra): do not include CI-specific config in docs examples ZIP archives (#36018)

In #35381, a new Protractor config file was introduced in docs examples,
`protractor-puppeteer.conf.js`, that was only supposed to be used on CI
and not be shipped with the ZIP archives provided for users to download
and experiment with the docs examples locally.

The logic to ignore the `protractor-puppeteer.conf.js` file was
incorrect, resulting in the file being retained in some examples (e.g.
[universal][1]). The problem was not immediately obvious, because most
examples explicitly specify all `**/*.js` files as ignored, but for
other examples the file was retained in the ZIP archive.

This commit fixes the logic to ensure the file is excluded from all docs
examples ZIP archives.

[1]: https://v9.angular.io/generated/zips/universal/universal.zip

PR Close #36018

aio/tools/example-zipper/exampleZipper.js

@@ -112,7 +112,7 @@ class ExampleZipper {
       '!**/npm-debug.log',
       '!**/example-config.json',
       '!**/wallaby.js',
-      '!e2e/protractor-puppeteer.conf.js',
+      '!**/e2e/protractor-puppeteer.conf.js',
       // AOT related files
       '!**/aot/**/*.*',
       '!**/*-aot.*'