build(deps): bump ubi8/openjdk-21-runtime in /src/main/docker (#335)

Bumps ubi8/openjdk-21-runtime from 1.20-2.1727147592 to 1.20-2.1729089290.

---
updated-dependencies:
- dependency-name: ubi8/openjdk-21-runtime
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

src/main/docker/Dockerfile.jvm

@@ -21,7 +21,7 @@
 # docker run -i --rm -p 8080:8080 -p 5005:5005 -e JAVA_DEBUG="true" quarkus/cryostat-reports-jvm
 #
 ###
-FROM registry.access.redhat.com/ubi8/openjdk-21-runtime:1.20-2.1727147592
+FROM registry.access.redhat.com/ubi8/openjdk-21-runtime:1.20-2.1729089290
 
 ENV LANG='en_US.UTF-8' LANGUAGE='en_US:en'