doc PG relnotes: rename commit link paragraph for clarity

FYI, during PDF builds, this link type generates a "Unresolved ID
reference found" warning because it is suppressed from the PDF output.

Backpatch-through: 12

doc/src/sgml/release.sgml

@@ -69,7 +69,7 @@ For new features, add links to the documentation sections.
    review, so each item is truly a community effort.
   </para>
 
-  <para id="release-no-print-output">
+  <para id="release-commit-links">
    Section markers (&sect;) in the release notes link to <ulink
    url="https://git.postgresql.org/gitweb/?p=postgresql.git"><application>gitweb</application></ulink>
    pages which show the primary <application>git</application> commit

doc/src/sgml/stylesheet-fo.xsl

@@ -21,7 +21,7 @@
 </xsl:template>
 
 <!-- Also suppress the description of the section markers in print mode -->
-<xsl:template match="appendix[@id='release']//para[@id='release-no-print-output']">
+<xsl:template match="appendix[@id='release']//para[@id='release-commit-links']">
   <!-- Output nothing for this para -->
 </xsl:template>