runtime(zip): raise minimum Vim version to v9.0

Problem:  the zip plugin uses features of Vim 9.0, but
          checks for a Vim version >= 7.2
          (interpolated strings and readblob() function)
Solution: raise the minimum Vim version to v9.0

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/autoload/zip.vim b/runtime/autoload/zip.vim
index 7e833fe..e51310a 100644
--- a/runtime/autoload/zip.vim
+++ b/runtime/autoload/zip.vim
@@ -29,9 +29,9 @@
  finish
 endif
 let g:loaded_zip= "v33"
-if v:version < 702
+if v:version < 900
  echohl WarningMsg
- echomsg "***warning*** this version of zip needs vim 7.2 or later"
+ echomsg "***warning*** this version of zip needs vim 9.0 or later"
  echohl Normal
  finish
 endif