Complete Release of Expression Language 4.0

[MattGill98]

These are the remaining steps as per the spec-committee guide for the project team to complete to finalise the release of Expression Language 4.0:

• [x] promotes api staging release promotes the specification api jars to maven central. An example release job script can be found here https://wiki.eclipse.org/MavenReleaseScript.
• [x] go through the merged jakarta.ee specification website page to verify all the links are valid.
• [x] approve the compatibility request.
• [x] The compatible implementation project/vendor MUST send an email to tck@eclipse.org for approval of the compatible implementation for trademark usage.
• [x] merge any final release branch as appropriate for the branch management for the project.

[arjantijms]

Everything has been done, so this can be closed. Thanks @MattGill98 for the help!