Change to have the creation of the changelog (via 'mvn site') to use a property.

Add reminder comment regarding exclusion for commons-io library.

Author: kwwall

pom.xml

@@ -251,7 +251,10 @@
  <version>1.6.7</version>
  <exclusions>
  <!-- excluded because version imported by AntiSamy Requires Java 8. We import
- the last Java 7 versions of these ourselves. -->
+ the last Java 7 versions of these ourselves. Remove the suppression of
+ CVE-2021-29425 from the 'suppressions.xml' file once we move to Java 8 as
+ the minimal JDK and start using the latest commons-io file.
+ -->
  <exclusion>
  <groupId>commons-io</groupId>
  <artifactId>commons-io</artifactId>
@@ -788,7 +791,7 @@
  <dates>
  <!-- TODO: Be sure to update. Should be date of previous official release -->
  <!-- Exact date should be in previous release notes file under 'documentation/' directory. -->
- <date>2021-05-07 00:00:00</date>
+ <date>${date.prev_release}</date>
  </dates>
  </configuration>
  </plugin>