Fixed the same typo in ssl-opt.sh

Signed-off-by: Ari Weiler-Ofek <ari.weiler-ofek@arm.com>
diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index 16e2675..ad87605 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -12526,7 +12526,7 @@
             0 \
             -c "Buffering HS message" \
             -c "found fragmented DTLS handshake message"\
-            -c "Next handshake message 1 not or only partially bufffered" \
+            -c "Next handshake message 1 not or only partially buffered" \
             -c "Next handshake message has been buffered - load"\
             -S "Buffering HS message" \
             -S "Next handshake message has been buffered - load"\