The example configuration included a space character that caused a
syntax error parsing the .qdocconf.
Replace the hardcoded qhp `QtDoc` project name with a placeholder.
Pick-to: 6.8
Change-Id: Iadf3a50e030f02182016ed9832f4f59d29f82c57
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>
(cherry picked from commit 4051ec3356bded10cd7ac66dc1149259bc48d36b)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
5fa520a77c