patch 9.0.1029: autoload directory missing from distribution

Problem:    Autoload directory missing from distribution.
Solution:   Add the autoload/zig directory to the list of distributed files.
diff --git a/Filelist b/Filelist
index 67c215b..b8b9ba0 100644
--- a/Filelist
+++ b/Filelist
@@ -783,6 +783,7 @@
 		runtime/autoload/README.txt \
 		runtime/autoload/dist/*.vim \
 		runtime/autoload/xml/*.vim \
+		runtime/autoload/zig/*.vim \
 		runtime/colors/*.vim \
 		runtime/colors/README.txt \
 		runtime/colors/lists/*.vim \