Fix typos prior to release

Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
diff --git a/library/ssl_tls12_client.c b/library/ssl_tls12_client.c
index 5def8b6..eda8891 100644
--- a/library/ssl_tls12_client.c
+++ b/library/ssl_tls12_client.c
@@ -1972,7 +1972,7 @@
 
     /*
      * Note: we currently ignore the PKS identity hint, as we only allow one
-     * PSK to be provisionned on the client. This could be changed later if
+     * PSK to be provisioned on the client. This could be changed later if
      * someone needs that feature.
      */
     *p += len;