[calls] Fix minor typo

[Evangelos Ribeiro Tzaras <devrtz src gnome org>]

commit a98cd6a802483d939a38245ffade42e5d23a7e4b
Author: Yuri Chornoivan <yurchor ukr net>
Date:   Thu May 26 11:45:07 2022 +0000

    Fix minor typo

 plugins/sip/calls-sip-call.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/plugins/sip/calls-sip-call.c b/plugins/sip/calls-sip-call.c
index 8ea7b7ee..5ad0c029 100644
--- a/plugins/sip/calls-sip-call.c
+++ b/plugins/sip/calls-sip-call.c
@@ -120,7 +120,7 @@ calls_sip_call_answer (CallsCall *call)
 
     if (!calls_sdp_crypto_context_generate_answer (self->sdp_crypto_context)) {
       g_warning ("Could not generate answer for crypto key exchange. Aborting!");
-      CALLS_EMIT_MESSAGE(self, _("Cryptographic key exchange unsucessful"), GTK_MESSAGE_WARNING);
+      CALLS_EMIT_MESSAGE(self, _("Cryptographic key exchange unsuccessful"), GTK_MESSAGE_WARNING);
       /* XXX this should (probably) never be reached */
       nua_respond (self->nh, 488, "Not acceptable here", TAG_END ());
       return;