Bump io.opentelemetry:opentelemetry-bom in /modules/grafana

Bumps [io.opentelemetry:opentelemetry-bom](https://github.com/open-telemetry/opentelemetry-java) from 1.54.1 to 1.56.0.
- [Release notes](https://github.com/open-telemetry/opentelemetry-java/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-java/blob/main/CHANGELOG.md)
- [Commits](open-telemetry/opentelemetry-java@v1.54.1...v1.56.0)

---
updated-dependencies:
- dependency-name: io.opentelemetry:opentelemetry-bom
  dependency-version: 1.56.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

modules/grafana/build.gradle

@@ -7,7 +7,7 @@ dependencies {
     testImplementation 'io.micrometer:micrometer-registry-otlp:1.15.4'
     testImplementation 'uk.org.webcompere:system-stubs-jupiter:2.1.8'
 
-    testImplementation platform('io.opentelemetry:opentelemetry-bom:1.54.1')
+    testImplementation platform('io.opentelemetry:opentelemetry-bom:1.56.0')
     testImplementation 'io.opentelemetry:opentelemetry-api'
     testImplementation 'io.opentelemetry:opentelemetry-sdk'
     testImplementation 'io.opentelemetry:opentelemetry-exporter-otlp'