fix: test_images/Dockerfile.rpm_ubi to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-RHEL9-GLIBC-5929809
- https://snyk.io/vuln/SNYK-RHEL9-GLIBCCOMMON-5929977
- https://snyk.io/vuln/SNYK-RHEL9-GLIBCMINIMALLANGPACK-5929849
- https://snyk.io/vuln/SNYK-RHEL9-LIBNGHTTP2-5955970
- https://snyk.io/vuln/SNYK-RHEL9-GLIBCMINIMALLANGPACK-6624576

test_images/Dockerfile.rpm_ubi

@@ -1,4 +1,4 @@
-FROM redhat/ubi9:9.0.0
+FROM redhat/ubi9:9.4-1181.1724035907
 ENV REV=2
 RUN yum -y upgrade
 RUN yum --allowerasing -y install curl xz nc