Update on RSD announcement wordings

When doing !712 (merged) I stumbled over some outdated wordings on RSD ("we are preparing...").

Please check if these minor updates fit.

requested review from @christian.meessen

assigned to @jandt-desy

changed the description

approved this merge request

added 5 commits

• 4ac89442...be299bf4 - 4 commits from branch master
• 3d84a139 - update on RSD announcement wordings

Compare with previous version

merged

mentioned in commit 0d1f96ed