update copyright text

[Kevingislason]

Description

Update copyright year on about page / config files / file headers

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

• [ x] Linked to Github issue with discussion and accepted design OR have an explanation in the PR that describes this work.
• Test following procedure in docs/testing-workflow.md
  n/a (no logical changes)
• Updated relevant documentation in the code.
  n/a (nothing to document)
• [x ] Re-reviewed Files changed in the Github PR explorer.
• Update the version numbers properly:
  • Cargo.toml
  • ui/src-tauri/Cargo.toml
  • ui/src-tauri/tauri.conf.json
  • ui/public/about.html
  • ui/package.json
    n/a (no logical changes)