Update alpine Docker tag to v3.23

| datasource | package | from | to   |
| ---------- | ------- | ---- | ---- |
| docker     | alpine  | 3.22 | 3.23 |


Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

build/Dockerfile

@@ -174,7 +174,7 @@ RUN --mount=type=bind,from=nginx-files,src=nginx_signing.key,target=/tmp/nginx_s
 	&& ubi-clean.sh
 
 ############################################# Base image for Alpine with NGINX Plus ##############################################
-FROM alpine:3.22@sha256:4b7ce07002c69e8f3d704a9c5d6fd3053be500b7f1c69fc0d80990c2ad8dd412 AS alpine-plus
+FROM alpine:3.23@sha256:51183f2cfa6320055da30872f211093f9ff1d3cf06f39a0bdb212314c5dc7375 AS alpine-plus
 ARG NGINX_PLUS_VERSION
 ARG PACKAGE_REPO
 ARG NGINX_AGENT_VERSION
@@ -212,7 +212,7 @@ RUN --mount=type=bind,from=alpine-fips-3.22,target=/tmp/fips/ \
 
 
 ############################################# Base image for Alpine with NGINX Plus, App Protect WAF and FIPS #############################################
-FROM alpine:3.22@sha256:4b7ce07002c69e8f3d704a9c5d6fd3053be500b7f1c69fc0d80990c2ad8dd412 AS alpine-plus-nap-fips
+FROM alpine:3.23@sha256:51183f2cfa6320055da30872f211093f9ff1d3cf06f39a0bdb212314c5dc7375 AS alpine-plus-nap-fips
 ARG NGINX_PLUS_VERSION
 ARG NAP_WAF_VERSION
 ARG PACKAGE_REPO
@@ -247,7 +247,7 @@ RUN --mount=type=bind,from=alpine-fips-3.22,target=/tmp/fips/ \
 
 
 ############################################# Base image for Alpine with NGINX Plus, App Protect WAFv5 and FIPS #############################################
-FROM alpine:3.22@sha256:4b7ce07002c69e8f3d704a9c5d6fd3053be500b7f1c69fc0d80990c2ad8dd412 AS alpine-plus-nap-v5-fips
+FROM alpine:3.23@sha256:51183f2cfa6320055da30872f211093f9ff1d3cf06f39a0bdb212314c5dc7375 AS alpine-plus-nap-v5-fips
 ARG NGINX_PLUS_VERSION
 ARG PACKAGE_REPO
 ARG NAP_WAF_VERSION