!8 install-info should be executed before the help package is uninstalled

From: @si-gui
Reviewed-by: @small_leek
Signed-off-by: @small_leek

festival.spec

@@ -1,6 +1,6 @@
 Name:           festival
 Version:        1.96
-Release:        42
+Release:        43
 Summary:        Festival Speech Synthesis System
 License:        MIT and GPL+ and TCL
 URL:            http://www.cstr.ed.ac.uk/projects/festival/
@@ -304,7 +304,7 @@ cp -p festdoc-%{docversion}/festival/info/* %{buildroot}%{_infodir}
 %post help
 /sbin/install-info %{_infodir}/festival.info.gz %{_infodir}/dir --section "Accessibility" > /dev/null 2>&1
 
-%postun help
+%preun help
 if [ "$1" = 0 ]; then
     /sbin/install-info --delete %{_infodir}/festival.info.gz %{_infodir}/dir --section "Accessibility" > /dev/null 2>&1
 fi
@@ -347,6 +347,9 @@ fi
 %{_mandir}/man1/*
 
 %changelog
+* Thu Nov 26 2020 Guoshuai Sun <sunguoshuai@huawei.com> - 1.96-43
+- install-info should be executed before the help package is uninstalled
+
 * Mon May 25 2020 Captain Wei <captain.a.wei@gmail.com> - 1.96-42
 - add -fpermissive compile option