build(deps): bump the opentelemetry-deps-java group across 1 directory with 2 updates (#1997)

Bumps the opentelemetry-deps-java group with 2 updates in the /java directory: [io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha](https://github.com/open-telemetry/opentelemetry-java-instrumentation) and [io.opentelemetry.javaagent:opentelemetry-javaagent](https://github.com/open-telemetry/opentelemetry-java-instrumentation).


Updates `io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha` from 2.20.1-alpha to 2.21.0-alpha
- [Release notes](https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-java-instrumentation/blob/main/CHANGELOG.md)
- [Commits](https://github.com/open-telemetry/opentelemetry-java-instrumentation/commits)

Updates `io.opentelemetry.javaagent:opentelemetry-javaagent` from 2.20.1 to 2.21.0
- [Release notes](https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-java-instrumentation/blob/main/CHANGELOG.md)
- [Commits](open-telemetry/opentelemetry-java-instrumentation@v2.20.1...v2.21.0)

---
updated-dependencies:
- dependency-name: io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha
  dependency-version: 2.21.0-alpha
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: opentelemetry-deps-java
- dependency-name: io.opentelemetry.javaagent:opentelemetry-javaagent
  dependency-version: 2.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: opentelemetry-deps-java
...

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

Author: dependabot[bot]

java/dependencyManagement/build.gradle.kts

@@ -9,7 +9,7 @@ plugins {
 data class DependencySet(val group: String, val version: String, val modules: List<String>)
 
 val DEPENDENCY_BOMS = listOf(
-    "io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha:2.20.1-alpha",
+    "io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha:2.21.0-alpha",
     "org.apache.logging.log4j:log4j-bom:2.25.2",
     "software.amazon.awssdk:bom:2.35.10"
 )
@@ -18,7 +18,7 @@ val DEPENDENCIES = listOf(
     "com.amazonaws:aws-lambda-java-core:1.4.0",
     "com.amazonaws:aws-lambda-java-events:3.16.1",
     "com.squareup.okhttp3:okhttp:5.2.1",
-    "io.opentelemetry.javaagent:opentelemetry-javaagent:2.20.1",
+    "io.opentelemetry.javaagent:opentelemetry-javaagent:2.21.0",
     "io.opentelemetry:opentelemetry-sdk-extension-aws:1.19.0",
     "io.opentelemetry.contrib:opentelemetry-aws-resources:1.50.0-alpha",
 )