doc PG relnotes: add attribution for time zone data files items

This is needed for a future script to add commit links;  specifically we
need the closing parentheses of the attribution.

Backpatch-through: 12

Author: bmomjian

doc/src/sgml/release-14.sgml

@@ -3179,7 +3179,7 @@ Branch: REL_12_STABLE [b59ae79b7] 2024-02-01 15:57:53 -0500
       release 2024a for DST law changes in Greenland, Kazakhstan, and
       Palestine, plus corrections for the Antarctic stations Casey and
       Vostok.  Also historical corrections for Vietnam, Toronto, and
-      Miquelon.
+      Miquelon. (Tom Lane)
      </para>
     </listitem>
 
@@ -6975,7 +6975,7 @@ Branch: REL_11_STABLE [7228f2f81] 2023-04-18 14:46:39 -0400
      <para>
       Update time zone data files to <application>tzdata</application>
       release 2023c for DST law changes in Egypt, Greenland, Morocco, and
-      Palestine.
+      Palestine. (Tom Lane)
      </para>
 
      <para>
@@ -8015,7 +8015,7 @@ Branch: REL_11_STABLE [7ddc428ef] 2023-01-31 17:37:34 -0500
       Update time zone data files to <application>tzdata</application>
       release 2022g for DST law changes in Greenland and Mexico,
       plus historical corrections for northern Canada, Colombia, and
-      Singapore.
+      Singapore. (Tom Lane)
      </para>
 
      <para>
@@ -9010,7 +9010,7 @@ Branch: REL_10_STABLE [b3326a753] 2022-11-01 17:09:21 -0400
       Update time zone data files to <application>tzdata</application>
       release 2022f for DST law changes in Chile, Fiji, Iran, Jordan,
       Mexico, Palestine, and Syria, plus historical corrections for Chile,
-      Crimea, Iran, and Mexico.
+      Crimea, Iran, and Mexico. (Tom Lane)
      </para>
 
      <para>
@@ -11664,7 +11664,7 @@ Branch: REL_10_STABLE [bc334ec9f] 2022-05-05 14:55:30 -0400
      <para>
       Update time zone data files to <application>tzdata</application>
       release 2022a for DST law changes in Palestine, plus historical
-      corrections for Chile and Ukraine.
+      corrections for Chile and Ukraine. (Tom Lane)
      </para>
     </listitem>
 
@@ -13945,7 +13945,7 @@ Branch: REL9_6_STABLE [22a498b9b] 2021-10-29 11:39:05 -0400
       Update time zone data files to <application>tzdata</application>
       release 2021e for DST law changes in Fiji, Jordan, Palestine, and
       Samoa, plus historical corrections for Barbados, Cook Islands,
-      Guyana, Niue, Portugal, and Tonga.
+      Guyana, Niue, Portugal, and Tonga. (Tom Lane)
      </para>
 
      <para>