res_pjsip: formatting error in documentation

The use of a '|' in the "global/debug" synopsis documentation caused the
generated html table on the wiki to add an extra column that included the
text after the pipe.

This patch replaces the pipe with a comma.

ASTERISK-28150

Change-Id: I3d79a6ca6d733d9cb290e779438114884b98a719

res/res_pjsip.c

@@ -1786,7 +1786,7 @@
 					<synopsis>The voicemail extension to send in the NOTIFY Message-Account header if not specified on endpoint or aor</synopsis>
 				</configOption>
 				<configOption name="debug" default="no">
-					<synopsis>Enable/Disable SIP debug logging.  Valid options include yes|no or
+					<synopsis>Enable/Disable SIP debug logging.  Valid options include yes, no, or
 						a host address</synopsis>
 				</configOption>
 				<configOption name="endpoint_identifier_order">