Count documentation (#8057)

* Changed aggregation example to include 0 value

* Fixed broken links in count docs (#8055)

* Added entry to whats-new.rst

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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Co-authored-by: Guillermo Cossio <[email protected]>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: 3 people

doc/whats-new.rst

@@ -95,6 +95,8 @@ Documentation
   By `Benoît Bovy <https://github.com/benbovy>`_.
 - Added a page clarifying the role of Xarray core team members.
   (:pull:`7999`) By `Tom Nicholas <https://github.com/TomNicholas>`_.
+- Fixed broken links in "See also" section of :py:meth:`Dataset.count` (:issue:`8055`, :pull:`8057`)
+  By `Articoking <https://github.com/Articoking>`_.
 
 Internal Changes
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