Update nginx Docker tag to v1.29.4

| datasource | package | from   | to     |
| ---------- | ------- | ------ | ------ |
| docker     | nginx   | 1.29.3 | 1.29.4 |


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

Author: renovate[bot]

build/Dockerfile

@@ -106,7 +106,7 @@ RUN --mount=type=bind,from=nginx-files,src=nginx_signing.rsa.pub,target=/etc/apk
 
 
 ############################################# Base image for Debian #############################################
-FROM nginx:1.29.3@sha256:553f64aecdc31b5bf944521731cd70e35da4faed96b2b7548a3d8e2598c52a42 AS debian
+FROM nginx:1.29.4@sha256:8056efe71da8ed19531f121e6ad42ab4164aa78bc28048bb98dd2d8012e6cb00 AS debian
 ARG NGINX_OSS_VERSION
 ARG NGINX_AGENT_VERSION