Update eduGAIN part in list of connected organisations

assigned to @jandt-desy

added 3 commits

• 85939715 - one line per new sentence
• d3eb765a - reformatting in-a-box
• 572e4b53 - minor corrections/adoptions

Compare with previous version

@sa.apweiler Thanks! How's that version?

• put the stuff in some more eyecatchy box and reformatted a bit
• made some minor reformulations 572e4b53

requested review from @sa.apweiler

approved this merge request

merged

mentioned in commit d5664cab