Bump wildfly/wildfly in /apps/unicorn-store-jakarta/wildfly

Bumps [wildfly/wildfly](https://github.com/wildfly/wildfly-container) from 37.0.0.Final-jdk21 to 39.0.0.Final-jdk21.
- [Release notes](https://github.com/wildfly/wildfly-container/releases)
- [Commits](wildfly/wildfly-container@37.0.0.Final...39.0.0.Final)

---
updated-dependencies:
- dependency-name: wildfly/wildfly
  dependency-version: 39.0.0.Final-jdk21
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

apps/unicorn-store-jakarta/wildfly/Dockerfile

@@ -4,7 +4,7 @@ COPY ./pom.xml ./pom.xml
 COPY src ./src/
 RUN mvn clean package --no-transfer-progress
 
-FROM quay.io/wildfly/wildfly:37.0.0.Final-jdk21 AS runtime
+FROM quay.io/wildfly/wildfly:39.0.0.Final-jdk21 AS runtime
 ENV POSTGRESQL_JDBC_DRIVER_VERSION=42.7.3
 RUN curl -L "https://repo1.maven.org/maven2/org/postgresql/postgresql/${POSTGRESQL_JDBC_DRIVER_VERSION}/postgresql-${POSTGRESQL_JDBC_DRIVER_VERSION}.jar" -o $JBOSS_HOME/postgresql.jar
 RUN printenv > $JBOSS_HOME/env.properties