patch 9.1.0470: tests: Test_ColonEight_MultiByte() fails sporadically

Problem:  tests: Test_ColonEight_MultiByte() fails on MS-Windows
Solution: mark test as flaky

This single line change should have happened as part of v9.1.469 (and I
mentioned it in the Commit message), but forgot to actually include the
change :facepalm

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/test_shortpathname.vim b/src/testdir/test_shortpathname.vim
index 5964630..59361ca 100644
--- a/src/testdir/test_shortpathname.vim
+++ b/src/testdir/test_shortpathname.vim
@@ -78,6 +78,7 @@
 endfunc
 
 func Test_ColonEight_MultiByte()
+  let g:test_is_flaky = 1
   let dir = 'Xtest'
 
   let file = dir . '/日本語のファイル.txt'
diff --git a/src/version.c b/src/version.c
index e805e2c..50a34c8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    470,
+/**/
     469,
 /**/
     468,