docs(guide/Running in Production): Typo fix

[365erik]

What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

docs update.

What is the current behavior? (You can also link to an open issue here)

Line reads 'using any 3rd part library that uses'.

What is the new behavior (if this is a feature change)?

Line now reads 'using any 3rd party library that uses'.

Does this PR introduce a breaking change?

No.

Please check if the PR fulfills these requirements

• The commit message follows our guidelines: https://github.com/angular/angular.js/blob/master/CONTRIBUTING.md#commit-message-format
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

Other information:

Changes verbiage '3rd part library' to '3rd party library'.

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[gkalpak]

Thx for submitting the PR 👍
We still need a signed CLA in order to merge this :/

[gkalpak]

Aha, I see you submitted #15328. Closing this one.