[LyX/master] Autoconf: actually require Qt 5.0.0

[Jean-Marc Lasgouttes]

commit c130ae945b19930c478ea2ae788aa7b3eda80d8c
Author: Jean-Marc Lasgouttes <lasgouttes at lyx.org>
Date:   Mon Dec 5 19:48:17 2022 +0100

    Autoconf: actually require Qt 5.0.0
---
 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/configure.ac b/configure.ac
index 8c0ad6c..372767d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -146,7 +146,7 @@ AC_CHECK_HEADERS(magic.h,
 ### setup the qt frontend.
 dnl The code below is not in a macro, because this would cause big
 dnl problems with the AC_REQUIRE contained in QT_DO_IT_ALL.
-QT_DO_IT_ALL([4.5.0])
+QT_DO_IT_ALL([5.0.0])
 AC_SUBST([FRONTENDS_SUBDIRS], [qt])
 FRONTEND_INFO="${FRONTEND_INFO}\
   Qt Frontend:\n\