Fix incorrect docstring, resolve #506.

[bdice]

Description

See #506 for issue description. This alters a docstring whose described behavior doesn't match the implementation.

Motivation and Context

Resolves #506.

Types of Changes

• Documentation update
• Bug fix
• New feature
• Breaking change¹

¹The change breaks (or has the potential to break) existing functionality.

Checklist:

• I am familiar with the Contributing Guidelines.
• I agree with the terms of the Contributor Agreement.
• My name is on the list of contributors.
• My code follows the code style guideline of this project.
• The changes introduced by this pull request are covered by existing or newly introduced tests.

If necessary:

• I have updated the API documentation as part of the package doc-strings.
• I have created a separate pull request to update the framework documentation on signac-docs and linked it here.
• I have updated the changelog and added all related issue and pull request numbers for future reference (if applicable). See example below.

[codecov]

Codecov Report

Merging #563 (722be2f) into master (6a3c2be) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #563   +/-   ##
=======================================
  Coverage   78.27%   78.27%           
=======================================
  Files          65       65           
  Lines        7069     7069           
  Branches     1311     1311           
=======================================
  Hits         5533     5533           
  Misses       1231     1231           
  Partials      305      305           

Impacted Files	Coverage Δ
signac/contrib/job.py	90.55% <ø> (ø)
signac/contrib/project.py	85.29% <ø> (ø)

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[csadorf]

Thx for fixing!

[cbkerr]

Thanks 🥺