Update dependency org.apache.maven:maven-core to v3.9.12 (#25942)

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

Author: renovate[bot]

.gitpod/Dockerfile

@@ -1,6 +1,6 @@
 FROM gitpod/workspace-full:latest
 ARG JAVA_VERSION=21.0.6-tem
-ARG MAVEN_VERSION=3.9.11
+ARG MAVEN_VERSION=3.9.12
 # Install Java 21, Maven and GitHub CLI
 RUN bash -c ". /home/gitpod/.sdkman/bin/sdkman-init.sh && \
     sdk install java ${JAVA_VERSION} && \