Update copyright notice

[cbartz]

Overview

Update the copyright notice with the new year.

Checklist

• The charm style guide was applied
• The contributing guide was applied
• The changes are compliant with ISD054 - Managing Charm Complexity
• The documentation is generated using src-docs
• The documentation for charmhub is updated
• The PR is tagged with appropriate label (urgent, trivial, complex)

[yhaliaw]

Might want to remove the blank comment lines. Otherwise, the PR looks good.

[github-actions]

Test coverage for a6bbb23

Name                           Stmts   Miss Branch BrPart  Cover   Missing
--------------------------------------------------------------------------
webhook_redelivery.py             94      0     12      0   100%
webhook_router/__init__.py         0      0      0      0   100%
webhook_router/app.py            104      0     30      0   100%
webhook_router/mq.py              22      0      0      0   100%
webhook_router/parse.py           52      0     16      0   100%
webhook_router/router.py          44      0      8      0   100%
webhook_router/validation.py       6      0      0      0   100%
--------------------------------------------------------------------------
TOTAL                            322      0     66      0   100%

Static code analysis report

Run started:2025-01-07 07:00:26.778716

Test results:
  No issues identified.

Code scanned:
  Total lines of code: 2381
  Total lines skipped (#nosec): 11
  Total potential issues skipped due to specifically being disabled (e.g., #nosec BXXX): 0

Run metrics:
  Total issues (by severity):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
  Total issues (by confidence):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
Files skipped (0):