chore(deps): bump the docker-images group across 1 directory with 2 updates (#7132)

Bumps the docker-images group with 2 updates in the /build directory: nginx/alpine-fips and alpine.


Updates `nginx/alpine-fips` from 0.2.3-alpine3.20 to 0.2.4-alpine3.20

Updates `alpine` from 3.17 to 3.21

---
updated-dependencies:
- dependency-name: nginx/alpine-fips
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: docker-images
- dependency-name: alpine
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: docker-images
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: AlexFenlon <[email protected]>
Co-authored-by: Paul Abel <[email protected]>

Author: 3 people

build/Dockerfile

@@ -14,8 +14,8 @@ ARG PACKAGE_REPO=pkgs.nginx.com
 FROM ghcr.io/nginx/dependencies/nginx-ot:nginx-1.27.3@sha256:22ea809c433bf114d527a9e40faff7f7bbdcadefdf4a6c776bd7c4d230c1cf6f AS opentracing-lib
 FROM ghcr.io/nginx/dependencies/nginx-ot:nginx-1.27.3-alpine@sha256:b3ff476b7214262023c017d15119c9112010d38661978bf5c3a43c3e496b3ef3 AS alpine-opentracing-lib
 FROM ghcr.io/nginx/dependencies/nginx-ubi-ppc64le:nginx-1.27.3@sha256:4cda07664f09f16d780d1e803b9748c31489ea21c463bbcca50d9dcf26081a6f AS ubi-ppc64le
-FROM ghcr.io/nginx/alpine-fips:0.2.3-alpine3.17@sha256:67b69b49aff96e185be841e2b2ff2d8236551ea5c18002bffa4344798d803fd8 AS alpine-fips-3.17
-FROM ghcr.io/nginx/alpine-fips:0.2.3-alpine3.20@sha256:4c29e5c50b122354d9d4ba6b97cdf64647468e788b965fc0240ead541653454a AS alpine-fips-3.20
+FROM ghcr.io/nginx/alpine-fips:0.2.4-alpine3.17@sha256:73de48bf4ce75fe74c3b7169e63b28edeecafac8c14cc52509becb8b98f84202 AS alpine-fips-3.17
+FROM ghcr.io/nginx/alpine-fips:0.2.4-alpine3.20@sha256:d28eeb2c22f4ef223cd3e424943451a782aa0ba1a96a1dbd20c8d90e8c4341e0 AS alpine-fips-3.20
 FROM redhat/ubi9-minimal:9.5@sha256:b87097994ed62fbf1de70bc75debe8dacf3ea6e00dd577d74503ef66452c59d6 AS ubi-minimal
 FROM golang:1.23-alpine@sha256:47d337594bd9e667d35514b241569f95fb6d95727c24b19468813d596d5ae596 AS golang-builder