Fix links to EUMETSAT documents

[sfinkens]

EUMETSAT has moved documents, update links accordingly.

[sfinkens]

@ameraner If you have time, can you please check that these are the official links?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.30%. Comparing base (4f0befb) to head (2f104d2).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3302   +/-   ##
=======================================
  Coverage   96.30%   96.30%           
=======================================
  Files         463      463           
  Lines       58863    58863           
=======================================
  Hits        56689    56689           
  Misses       2174     2174           

Flag	Coverage Δ
behaviourtests	3.61% <ø> (ø)
unittests	96.39% <ø> (ø)

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[ameraner]

LGTM, thank you for looking into this! The links look like the correct ones to me, it seems that there is only one version of each document on the User Portal anyway.

[coveralls]

Pull Request Test Coverage Report for Build 19430188987

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall first build on fix-eum-links at 96.383%

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Totals
Change from base Build 19293346095:	96.4%
Covered Lines:	56567
Relevant Lines:	58690

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💛 - Coveralls