Bump io.micrometer:micrometer-registry-prometheus from 1.15.3 to 1.15.4 (#481)

Bumps [io.micrometer:micrometer-registry-prometheus](https://github.com/micrometer-metrics/micrometer) from 1.15.3 to 1.15.4.
- [Release notes](https://github.com/micrometer-metrics/micrometer/releases)
- [Commits](micrometer-metrics/micrometer@v1.15.3...v1.15.4)

---
updated-dependencies:
- dependency-name: io.micrometer:micrometer-registry-prometheus
  dependency-version: 1.15.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

app/build.gradle.kts

@@ -53,7 +53,7 @@ dependencies {
     implementation("com.auth0:java-jwt:4.5.0")
     implementation("com.fasterxml.jackson.datatype:jackson-datatype-jsr310:2.19.2")
     implementation("com.nimbusds:nimbus-jose-jwt:10.4.2")
-    implementation("io.micrometer:micrometer-registry-prometheus:1.15.3")
+    implementation("io.micrometer:micrometer-registry-prometheus:1.15.4")
     implementation("net.logstash.logback:logstash-logback-encoder:8.1")
     implementation("org.apache.kafka:kafka-streams:4.1.0")
     implementation("io.prometheus:prometheus-metrics-tracer-initializer:1.4.1")