Resolve #93: add `year` to manifest URL

[nutjob4life]

📖 Summary

Merge this and you get:

• An update to a base test case that checks of the manifest URL of a SIP's label has the current year in it
• SIP label generation that includes the year in the manifest URL

🩺 Test Data and/or Report

Running tests at level 1
Running zope.testrunner.layer.UnitTests tests:
  Set up zope.testrunner.layer.UnitTests in 0.000 seconds.
  Running:
    13/16 (81.2%) test_logging_arguments (pds.aipgen.tests.test_utils.ArgumentTestCase)usage: 

  Ran 16 tests with 0 failures, 0 errors, 0 skipped in 0.521 seconds.
Tearing down left over layers:
  Tear down zope.testrunner.layer.UnitTests in 0.000 seconds.

🧩 Related Issues

• 93