build(deps): bump com.graphhopper:graphhopper-core from 8.0 to 9.1

Bumps [com.graphhopper:graphhopper-core](https://github.com/graphhopper/graphhopper) from 8.0 to 9.1.
- [Release notes](https://github.com/graphhopper/graphhopper/releases)
- [Changelog](https://github.com/graphhopper/graphhopper/blob/master/CHANGELOG.md)
- [Commits](graphhopper/graphhopper@8.0...9.1)

---
updated-dependencies:
- dependency-name: com.graphhopper:graphhopper-core
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

contribs/vsp/pom.xml

@@ -189,7 +189,7 @@
 		<dependency>
 			<groupId>com.graphhopper</groupId>
 			<artifactId>graphhopper-core</artifactId>
-			<version>8.0</version>
+			<version>9.1</version>
 		</dependency>
 		<!-- Enforce version -->
 		<dependency>