Auto-update copyright year during hugo builds

[kimlaberinto]

Replace hard-coded 2021 year with "{year}", so that it can be auto-updated during the hugo build process.

"{year}" is updated in layouts/partials/footer.html as seen below with the replace . "{year}" now.Year portion of the code.

<p class="text-sm text-tertiary-text">{{ with .Site.Copyright }}{{ replace . "{year}" now.Year | safeHTML }} &middot; {{ end }} Powered by the <a href="https://github.com/wangchucheng/hugo-eureka" class="hover:text-eureka">Eureka</a> theme for <a href="https://gohugo.io" class="hover:text-eureka">Hugo</a></p>

I believe the footer is the only place where the copyright is shown.

[wangchucheng]

Yes, {year} is just a kind of "syntactic sugar" when I designed Eureka. I did not mention it because I am not sure this is the best practice for now.Year.

I want to find some native Hugo way to do it. And I tried to use now.Year directly but it fails as far as I remembered. If you find how to archive it natively, I am more than pleased to add it.