Bump powsybl-single-line-diagram-core from 2.7.0 to 2.8.0

Bumps [powsybl-single-line-diagram-core](https://github.com/powsybl/powsybl-single-line-diagram) from 2.7.0 to 2.8.0.
- [Release notes](https://github.com/powsybl/powsybl-single-line-diagram/releases)
- [Commits](powsybl/powsybl-diagram@v2.7.0...v2.8.0)

---
updated-dependencies:
- dependency-name: com.powsybl:powsybl-single-line-diagram-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pom.xml

@@ -28,7 +28,7 @@ SPDX-License-Identifier: Apache-2.0
 
         <quarkus.platform.version>2.7.2.Final</quarkus.platform.version>
         <slf4j.version>1.7.36</slf4j.version>
-        <powsybl.sld.version>2.7.0</powsybl.sld.version>
+        <powsybl.sld.version>2.8.0</powsybl.sld.version>
         <gson.version>2.9.0</gson.version>
         <openpojo.version>0.9.1</openpojo.version>
     </properties>