Typo fix for doc

[lee1043]

Description

Typo fix for doc: https://xcdat.readthedocs.io/en/latest/generated/xarray.Dataset.temporal.climatology.html, description for reference_period.

('1850-01-01', 1899-12-31') --> ('1850-01-01', '1899-12-31') (missed single quotation mark in front of 1899 added)

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules

If applicable:

• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass with my changes (locally and CI/CD build)
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have noted that this is a breaking change for a major release (fix or feature that would cause existing functionality to not work as expected)

[codecov-commenter]

Codecov Report

Patch and project coverage have no change.

Comparison is base (0ba0cbd) 100.00% compared to head (dd1ee58) 100.00%.

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Additional details and impacted files

@@            Coverage Diff            @@
##              main      #491   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           14        14           
  Lines         1424      1424           
=========================================
  Hits          1424      1424           

Impacted Files	Coverage Δ
xcdat/temporal.py	100.00% <ø> (ø)

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[tomvothecoder]

Thanks Jiwoo! Looks good to me.

[lee1043]

@tomvothecoder thanks!