fix error in passwd example

[chrisbirster]

Description

Fixes a spelling error in the passwd example. If you try to run the example provided you will get an error message:

NoMethodError: undefined method uid' for /etc/passwd:#<Class:0x00000000058e7a60> from (pry):61:in load_with_context'

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New content (non-breaking change)
• Breaking change (a content change which would break existing functionality or processes)

Checklist:

• I have read the CONTRIBUTING document.

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[chef-expeditor]

Hello chrisbirster! Thanks for the pull request!

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Thank you for contributing!

[clintoncwolfe]

Thanks!