Fix section header capitalization.

We only capitalize the first word. I've left Token Binding alone because
that appears to be the full name. But "QUIC Transport Parameters" just
describe's QUIC's transport parameters.

Change-Id: I7e0f69e24ff4080c0470c87825dffa1a9aa6df97
Reviewed-on: https://boringssl-review.googlesource.com/c/32344
Commit-Queue: Steven Valdez <svaldez@google.com>
Reviewed-by: Steven Valdez <svaldez@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>

include/openssl/ssl.h

diff --git a/include/openssl/ssl.h b/include/openssl/ssl.h
index 0d5a444..117321a 100644
--- a/include/openssl/ssl.h
+++ b/include/openssl/ssl.h
@@ -3004,7 +3004,7 @@
 OPENSSL_EXPORT const char *SSL_get_psk_identity(const SSL *ssl);
 
 
-// QUIC Transport Parameters.
+// QUIC transport parameters.
 //
 // draft-ietf-quic-tls defines a new TLS extension quic_transport_parameters
 // used by QUIC for each endpoint to unilaterally declare its supported