Bump select server and client dependencies

I'm focusing on bigger direct dependencies, mainly the new GStreamer
releases since I last touched this.

Author: featherbread

Dockerfile

@@ -1,12 +1,12 @@
-# syntax = docker.io/docker/dockerfile:1.21
+# syntax = docker.io/docker/dockerfile:1.24
 
 # The Alpine and Go base images must use the same release of Alpine.
 ARG ALPINE_BASE=docker.io/library/alpine:3.23
 ARG GOLANG_BASE=docker.io/library/golang:1.26-alpine3.23
 # The Node.js image doesn't require any particular OS.
 ARG NODEJS_BASE=docker.io/library/node:24-alpine
 # See https://gstreamer.freedesktop.org/news/.
-ARG GSTREAMER_VERSION=1.28.1
+ARG GSTREAMER_VERSION=1.28.3
 
 # Mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git.
 # Since this is formally marked as a "public mirror" in the GitHub web UI, my