Bump io.opentelemetry:opentelemetry-bom from 1.27.0 to 1.28.0 in /java (#638)

Bumps [io.opentelemetry:opentelemetry-bom](https://github.com/open-telemetry/opentelemetry-java) from 1.27.0 to 1.28.0.
- [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@v1.27.0...v1.28.0)

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

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

Author: dependabot[bot]

java/build.gradle.kts

@@ -28,7 +28,7 @@ val javaagentDependency by configurations.creating {
 }
 
 dependencies {
-    compileOnly(platform("io.opentelemetry:opentelemetry-bom:1.27.0"))
+    compileOnly(platform("io.opentelemetry:opentelemetry-bom:1.28.0"))
     compileOnly(platform("io.opentelemetry:opentelemetry-bom-alpha:1.28.0-alpha"))
     // Already included in wrapper so compileOnly
     compileOnly("io.opentelemetry:opentelemetry-sdk-extension-autoconfigure-spi")