🩹(frontend) remove incorrect reference to ProConnect on the prejoin

Remove incorrect reference to ProConnect (DINUM SSO) from content
literals, where it should not be mentioned by default in the
white labeled version.

It closes #1075

CHANGELOG.md

@@ -8,6 +8,11 @@ and this project adheres to
 
 ## [Unreleased]
 
+### Fixed
+
+- 🩹(frontend) remove incorrect reference to ProConnect on the prejoin #1080
+- ✨(frontend) add Ctrl+Shift+/ to open shortcuts settings #1050
+
 ### Changed
 
 - 🔒️(backend) enhance API input validation to strengthen security #1053
@@ -42,7 +47,6 @@ and this project adheres to
 - ♿️(frontend) improve accessibility of the IntroSlider carousel #1026
 - ♿️(frontend) add skip link component for keyboard navigation #1019
 - ♿️(frontend) announce mic/camera state to SR on shortcut toggle #1052
-- ✨(frontend) add Ctrl+Shift+/ to open shortcuts settings #1050
 
 ### Fixed