fix: percona-backup-mongodb/Dockerfile.ubi8 to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-RHEL8-LIBCAP-5660406
- https://snyk.io/vuln/SNYK-RHEL8-LIBCAP-5660413
- https://snyk.io/vuln/SNYK-RHEL8-OPENSSLLIBS-5804834
- https://snyk.io/vuln/SNYK-RHEL8-SQLITELIBS-6140699
- https://snyk.io/vuln/SNYK-RHEL8-SYSTEMDLIBS-6137227

percona-backup-mongodb/Dockerfile.ubi8

@@ -1,4 +1,4 @@
-FROM redhat/ubi8-minimal
+FROM redhat/ubi8-minimal:8.9-1108
 
 # Please don't remove old-style LABEL since it's needed for RedHat certification
 LABEL name="Percona Backup for MongoDB" \