RFR: 8304993: bad sentence break in DateFormat

[Justin Lu]

This PR fixes a bad sentence break in DateFormat.FIELD AM_PM that caused 
incomplete API

Before:
<img width="1024" alt="Screen Shot 2023-03-27" 
src="https://user-images.githubusercontent.com/67398801/228359165-f8c66ca2-745b-47ea-bca9-9c4afc7af914.png";>

After:
<img 
src="https://user-images.githubusercontent.com/67398801/228358935-9d978a7a-bfa5-42df-85a7-587e39d6c82c.png";
 width="800" height="40">

-------------

Commit messages:
 - Wrap e.g. with @literal to fix first sentence detection

Changes: https://git.openjdk.org/jdk/pull/13216/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13216&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8304993
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/13216.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13216/head:pull/13216

PR: https://git.openjdk.org/jdk/pull/13216