fix: Fix the PNPM example test

[ramykl]

Currently the pnpm example test is failing. This seems to be due to an old version of pnpm being present on the machine (version 8 instead of version 9). I'm still a little unsure why this is the case...I would either expect pnpm not to be installed at all or for it to install the latest version as pnpm isn't packaged with node...maybe a cache hit?

After doing various testing ramykl#4 (sorry for the bad commit messages) it seems like the node orb doesn't install the package manager when using node/install-packages.

This will explicitly install the pnpm package manager through the node orb, which by default will install the latest version.

[cypress-app-bot]

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[ramykl]

@jennifer-shehane try again now. Sorry, the equal condition needed an and before it

[jennifer-shehane]

@ramykl This is failing when attempting to deploy

https://app.circleci.com/pipelines/github/cypress-io/circleci-orb/1980/workflows/d6852e7e-67f2-4268-bc7e-ecf6f4e14169/jobs/7065

[MikeMcC399]

@jennifer-shehane

There is a workflow error in test-deploy.yml which causes a pnpm failure during deploy, although previously it passes.

As you noted in #468 (comment), this bug is preventing any new release of the Orb, like for the new Node documentation.

So if the broken master branch is to be fixed, either the pnpm example needs to be reverted or the workflow needs to be fixed.

Unfortunately the process for merging external contributions is risky (see #451) as errors are not found until it is too late.