message: doc: fix typo in bitcoin_qt.m4 comment
diff: @@ -268,7 +268,7 @@ AC_DEFUN([_BITCOIN_QT_CHECK_QT5],[
  dnl Internal. Check if the included version of Qt is greater than Qt58.
  dnl Requires: INCLUDES must be populated as necessary.
  -dnl Output: bitcoin_cv_qt5=yes|no
  +dnl Output: bitcoin_cv_qt58=yes|no
  AC_DEFUN([_BITCOIN_QT_CHECK_QT58],[
  AC_CACHE_CHECK(for > Qt 5.7, bitcoin_cv_qt58,[
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  