sip_to_pjsip: Set correct tls transport method

A recent update had a copy/paste error where the unused variable 'val' was
being passed to the set_value function instead of the 'method' value itself.

This patch passes in the right variable.

ASTERISK-22374

Change-Id: I895b7b3779ce4442bc58b8ec40d59dd29bb43f06

contrib/scripts/sip_to_pjsip/sip_to_pjsip.py

@@ -797,7 +797,7 @@ def create_tls(sip, pjsip, nmapped):
         'sslv23' as default when unspecified, which gives TLSv1.0 and v1.2.
         """
         method = 'sslv23'
-    set_value('method', val, 'transport-tls', pjsip, nmapped, 'transport')
+    set_value('method', method, 'transport-tls', pjsip, nmapped, 'transport')
 
     set_transport_common('transport-tls', pjsip, nmapped)
     try: