doc: Fix link reference for PGSSLMAXPROTOCOLVERSION
The link was pointing to the minimum protocol version.  Incorrect as of
Author: Daniel Gustafsson
Discussion:
Backpatch-through: 13
@@ -7872,7 +7872,7 @@ myEventProc(PGEventId evtId, void *evtInfo, void *passThrough)
<primary><envar>PGSSLMAXPROTOCOLVERSION</envar></primary>
</indexterm>
<envar>PGSSLMAXPROTOCOLVERSION</envar> behaves the same as the <xref
- linkend="libpq-connect-ssl-min-protocol-version"/> connection parameter.
+ linkend="libpq-connect-ssl-max-protocol-version"/> connection parameter.
</para>
</listitem>
