Git 2.38-rc2

We have small updates since -rc1 but none of them is about a new
thing and there is no updates to the release notes.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/GIT-VERSION-GEN b/GIT-VERSION-GEN
index a6d1044..8fdc6a5 100755
--- a/GIT-VERSION-GEN
+++ b/GIT-VERSION-GEN
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 GVF=GIT-VERSION-FILE
-DEF_VER=v2.38.0-rc1
+DEF_VER=v2.38.0-rc2
 
 LF='
 '