Tweak release note.

Author: anthony-tuininga

doc/src/release_notes.rst

@@ -24,7 +24,7 @@ Thin Mode Changes
 #)  Added support for using a wallet for one-way TLS connections, rather than
     requiring OS recognition of certificates
     (`issue 65 <https://github.com/oracle/python-oracledb/issues/65>`__).
-#)  Added support for connecting to CMAN using `(SOURCE_ROUTE=YES)` in the
+#)  Added support for connecting to CMAN using ``(SOURCE_ROUTE=YES)`` in the
     connect string
     (`issue 81 <https://github.com/oracle/python-oracledb/issues/81>`__).
 #)  Fixed bug when fetching nested cursors with more columns than the parent