Update the corpora submodule

We update the corpora submodule to include a fuzz testcase for the conf
timeout.

Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/20839)

diff --git a/fuzz/corpora b/fuzz/corpora
index 504043945928718d98033cd09b48a482641e2149..8667a2d6dd6323472d8620027c15d8c50fa8efcb 160000 (submodule)
--- a/fuzz/corpora
+++ b/fuzz/corpora
@@ -1 +1 @@
-Subproject commit 504043945928718d98033cd09b48a482641e2149
+Subproject commit 8667a2d6dd6323472d8620027c15d8c50fa8efcb