Update the corpora

Updated the fuzz corpora to include a testcase for the zero length
handshake fragment records issue fixed by the previous commit.

Reviewed-by: Todd Short <todd.short@me.com>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/20824)

diff --git a/fuzz/corpora b/fuzz/corpora
index 7da889070f7d291f9fc20d0bc875827b329eefef..504043945928718d98033cd09b48a482641e2149 160000 (submodule)
--- a/fuzz/corpora
+++ b/fuzz/corpora
@@ -1 +1 @@
-Subproject commit 7da889070f7d291f9fc20d0bc875827b329eefef
+Subproject commit 504043945928718d98033cd09b48a482641e2149