[TEST] Apache Struts 7.0.0-M3 test build is ready

Hello,

This is a third milestone of Struts 7.x series, which is based on
JakartaEE 6. Please take the time and test the bits - any help is
appreciated. Please report any problems you will spot.

Here are the changes from the previous version:
https://github.com/apache/struts/releases/tag/STRUTS_7_0_0_M3

Staging Maven repo
https://repository.apache.org/content/groups/staging/

* please read our guideline how to setup your Maven build to include
the Staging repository
  https://struts.apache.org/builds.html#test-builds

Standalone artifacts
https://dist.apache.org/repos/dist/dev/struts/7.0.0-M3/

Release notes
https://cwiki.apache.org/confluence/display/WW/Version+Notes+7.0.0-M3


Have fun!
Łukasz