13.4: Avoid version confusion in release notes

The EoL for stable/14 is based on the release date of 14.0-RELEASE, not
13.3-RELEASE.

Remove comment about using "13.3-RELEASE or the stable/14 branch" to
migrate off 32-bit platforms.

Sponsored by:	Amazon
Noticed by:	Graham Perrin

website/content/en/releases/13.4R/relnotes.adoc

@@ -314,8 +314,7 @@ However, all 32-bit platforms are Tier-2 or Tier-3, and support for individual p
 
 With the current support schedule, stable/14 will reach end of life (EOL) around 5 years after the release of FreeBSD 14.0-RELEASE.
 The EOL of stable/14 will mark the end of support for deprecated 32-bit platforms, including source releases, pre-built packages, and support for building applications from ports.
-With the release of {releasePrev} in November 2023, support for deprecated 32-bit platforms will end in November 2028.
+With the release of 14.0-RELEASE in November 2023, support for deprecated 32-bit platforms will end in November 2028.
 
 The project may choose to alter this approach when FreeBSD 15.0 is released by extending some level of support for one or more of the deprecated platforms in 15.0 or later.
 Any alterations will be driven by community feedback and committed efforts to support these platforms.
-Use FreeBSD {releasePrev} and following minor releases, or the stable/14 branch, to migrate off 32-bit platforms.