Change the text in the professional support in the README.md

Hello,

to be more in line with the website we should change the text for the professional support

Cheers

assigned to @bmortier

cloned from fd#6184 (closed)

changed milestone to %FusionDirectory 1.4

added PJ1802-0188 label

marked this issue as related to fd#6184 (closed)

mentioned in commit 8dfe3a73

changed milestone to %Schema2ldif 1.3.1