Merge branch...

Merge branch '6157-fix-reference-to-the-documentation-after-moving-around-fusiondirectory-documentationin-upgrade' into '1.4-dev'

Resolve "fix reference to the documentation after moving around fusiondirectory documentationin UPGRADE.md and README.md"

Closes #6157

See merge request fusiondirectory/fd!888

(cherry picked from commit 598c9c59)

fd99dc93  fix(docs) fix reference to the documentation after moving around...