[Tech] bump org.hibernate.orm:hibernate-spatial in /backend

Bumps [org.hibernate.orm:hibernate-spatial](https://github.com/hibernate/hibernate-orm) from 6.6.13.Final to 7.1.11.Final.
- [Release notes](https://github.com/hibernate/hibernate-orm/releases)
- [Changelog](https://github.com/hibernate/hibernate-orm/blob/7.1.11/changelog.txt)
- [Commits](hibernate/hibernate-orm@6.6.13...7.1.11)

---
updated-dependencies:
- dependency-name: org.hibernate.orm:hibernate-spatial
  dependency-version: 7.1.11.Final
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

backend/build.gradle.kts

@@ -84,7 +84,7 @@ dependencies {
     implementation("org.postgresql:postgresql")
     implementation("org.flywaydb:flyway-core:$flywayVersion")
     implementation("org.flywaydb:flyway-database-postgresql:$flywayVersion")
-    implementation("org.hibernate.orm:hibernate-spatial:6.6.13.Final")
+    implementation("org.hibernate.orm:hibernate-spatial:7.1.11.Final")
     implementation("org.hibernate.validator:hibernate-validator:9.1.0.Final")
     implementation("io.hypersistence:hypersistence-utils-hibernate-63:3.12.0")