www/opengist: Update to 1.12.1

Remove aarch64 support, since tailwindcss 4 is currently not supported
in aarch64.

Changes since 1.11.1:

v1.12.1

Added

• More translation strings (#605)

Fixed

• Allow Access Tokens with Required Login (#611)
• Make text files renderable with mimetypes different than text/plain (#612)
• Improve security on raw files endpoint (#613)

Admins of Opengist instances may want to run "Synchronize all gists
previews" in the admin panel.

v1.12.0

Added

• Access tokens (#602)
• Fuzzy search for gist search (#555)
• Allow Unicode letters/numbers in topics (#597)
• Resize editor height (#600)
• More translation strings (#516) (#604)

Fixed

• Don't panic on Go TCP errors (#601)

Other

• Reduce footprint of Docker image (#515)
• Update Go + JS deps (#603)
• Configure Dependabot for updates on Go and NPM (#449)

Helm Chart

• Use existing pvc claim of provided (#547)
• Adds StatefulSet support (#549)
• Move Prom metrics to a dedicated port + support ServiceMonitor (#599)