Bump struts2-core from 2.5.27 to 2.5.28.2 in /pgp-keys-map-test1

Bumps [struts2-core](https://github.com/apache/struts) from 2.5.27 to 2.5.28.2.
- [Release notes](https://github.com/apache/struts/releases)
- [Commits](https://github.com/apache/struts/commits)

---
updated-dependencies:
- dependency-name: org.apache.struts:struts2-core
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

pgp-keys-map-test1/pom.xml

@@ -560,7 +560,7 @@
         <dependency>
             <groupId>org.apache.struts</groupId>
             <artifactId>struts2-core</artifactId>
-            <version>[2.5.27]</version>
+            <version>[2.5.28.2]</version>
         </dependency>
         <dependency>
             <groupId>org.apache.taglibs</groupId>