Bump opentelemetry.sdk.version from 1.55.0 to 1.56.0

Bumps `opentelemetry.sdk.version` from 1.55.0 to 1.56.0.

Updates `io.opentelemetry:opentelemetry-bom` from 1.55.0 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@v1.55.0...v1.56.0)

Updates `io.opentelemetry:opentelemetry-bom-alpha` from 1.55.0-alpha to 1.56.0-alpha
- [Release notes](https://github.com/open-telemetry/opentelemetry-java/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-java/blob/main/CHANGELOG.md)
- [Commits](https://github.com/open-telemetry/opentelemetry-java/commits)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

cf-java-logging-support-opentelemetry-agent-extension/pom.xml

@@ -16,7 +16,7 @@
     </parent>
 
     <properties>
-        <opentelemetry.sdk.version>1.55.0</opentelemetry.sdk.version>
+        <opentelemetry.sdk.version>1.56.0-alpha</opentelemetry.sdk.version>
     </properties>
 
     <dependencyManagement>
@@ -31,7 +31,7 @@
             <dependency>
                 <groupId>io.opentelemetry</groupId>
                 <artifactId>opentelemetry-bom-alpha</artifactId>
-                <version>${opentelemetry.sdk.version}-alpha</version>
+                <version>${opentelemetry.sdk.version}</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>