Admin: Update Docs to point to getmoto

[bblommers]

See #5823

[codecov-commenter]

Codecov Report

Merging #5826 (12b7829) into master (89fdf9d) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #5826   +/-   ##
=======================================
  Coverage   96.18%   96.18%           
=======================================
  Files         753      753           
  Lines       73969    73969           
=======================================
  Hits        71150    71150           
  Misses       2819     2819           

Flag	Coverage Δ
servertests	36.95% <ø> (ø)
unittests	96.12% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
moto/core/custom_responses_mock.py	72.94% <ø> (ø)
moto/dynamodb/models/__init__.py	93.61% <ø> (ø)
moto/ec2/exceptions.py	97.65% <ø> (ø)
moto/ec2/responses/general.py	90.00% <ø> (ø)
moto/ec2/responses/instances.py	99.09% <ø> (ø)
moto/ec2/utils.py	93.63% <ø> (ø)
moto/redshiftdata/models.py	100.00% <ø> (ø)
moto/sns/models.py	96.89% <ø> (ø)

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[github-actions]

This is now part of moto >= 4.1.0.dev5