Bump nginx from b9e1705 to d05f6fe in /docker-nginx

[dependabot]

Bumps nginx from b9e1705 to d05f6fe.

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[katherine-signal]

Here's a diff of the changes from b9e1705b to d05f6fee. I ended up following what Chris did because poking around the docker-library/repo-info repos was not fruitful (I wasn't sure how to get a git diff of a non-tag/branch in the github UI, and locally it was just too detailed code changes to sift through). As the doc mentioned, it was difficult to pick out a high-level summary of the changes, but here is what I think is relevant:

• I did the "follow base image digest back" directions, and the base Alpine image did not change from 3.20.5.
  • But the diff shows that the docker-nginx source changed from nginxinc/docker-nginx@2396849 to nginxinc/docker-nginx@cffeb93, and one of the changes included between the two commits was bumping the mainline branch to Alpine 3.21, which I wasn't quite able to reconcile with the point above...
• Bumped nginx version from 1.26.2 to 1.26.3, which contained some bug/security fixes and also took along some dependency version updates (commit)
  • There are a bunch of usr/lib/nginx/modules/... SHA digest changes, which I think is associated with this?
• And then there were also some Alpine package manager related updates? e.g.lib/apk/db/scripts.tar, etc/apk/world, and lib/apk/db/installed

Things I wasn't sure about:

• Whether the base Alpine image actually changed (I don't think so?)
• What some of the ManifestBlobMismatch events in the diff referred to
• If there are any other updates with the nginx update that I've missed