Add Data Store to EUMETSAT part

[pdebuyl]

Add the url data.eumetsat.int to the download page of the docs.

(tiny change not requiring the check boxes as far as I understand)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.92%. Comparing base (5ffe15e) to head (30a0e6a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2766   +/-   ##
=======================================
  Coverage   95.92%   95.92%           
=======================================
  Files         377      377           
  Lines       53489    53489           
=======================================
  Hits        51310    51310           
  Misses       2179     2179           

Flag	Coverage Δ
behaviourtests	4.10% <ø> (ø)
unittests	96.02% <ø> (ø)

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[coveralls]

Pull Request Test Coverage Report for Build 8388041097

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 96.005%

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Totals
Change from base Build 8350021041:	0.0%
Covered Lines:	51182
Relevant Lines:	53312

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💛 - Coveralls

[mraspaud]

LGTM