Fix error: PowerShell environment variable setting

[matt9ucci]

Proposed changes

Adding ' (or ").

If not, PowerShell throws exception:

PS> $Env:DOCKER_CONTEXT=docker-test
docker-test : The term 'docker-test' is not recognized as the name of a cmdlet, function, script file, or operable
program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:21
+ $Env:DOCKER_CONTEXT=docker-test
+                     ~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (docker-test:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException

[netlify[bot]]

✔️ Deploy Preview for docsdocker ready!

🔨 Explore the source changes: ebdd9081bca7d084f099df799be98a4e0a5a6bca

🔍 Inspect the deploy log: https://app.netlify.com/sites/docsdocker/deploys/612afd1fb4431c0007564d4b

😎 Browse the preview: https://deploy-preview-13427--docsdocker.netlify.app

[docker-robott]

Thanks for the pull request. We'd like to make our product docs better, but haven’t been able to review all the suggestions. As our docs have also diverged, we do not have the bandwidth to review and rebase old pull requests.

If the updates are still relevant, review our contribution guidelines and rebase your pull request against the latest version of the docs, then mark it as fresh with a /remove-lifecycle stale comment. If not, this pull request will be closed in 30 days. This helps our maintainers focus on the active pull requests.

Prevent pull requests from auto-closing with a /lifecycle frozen comment.

/lifecycle stale

[netlify[bot]]

✅ Deploy Preview for docsdocker ready!

Name	Link
🔨 Latest commit	cfe28ef08f0dad1678dc9c7be2e9a502ed2e8234
🔍 Latest deploy log	https://app.netlify.com/sites/docsdocker/deploys/63817de6af39e80009a372fc
😎 Deploy Preview	https://deploy-preview-13427--docsdocker.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site settings.