fix: upgrade org.liquibase:liquibase-core from 4.29.2 to 4.30.0

Snyk has created this PR to upgrade org.liquibase:liquibase-core from 4.29.2 to 4.30.0.

See this package in maven:
org.liquibase:liquibase-core

See this project in Snyk:
https://app.snyk.io/org/oph-snyk/project/4612977b-f69e-4d1b-bf98-ce8f01ee9fbf?utm_source=github-cloud-app&utm_medium=referral&page=upgrade-pr

backend/pom.xml

@@ -35,7 +35,7 @@
     <!-- latest version for Java 17 https://github.com/lukas-krecan/ShedLock#versions -->
     <shedlock.version>5.16.0</shedlock.version>
     <poi.version>5.3.0</poi.version>
-    <liquibase.version>4.29.2</liquibase.version>
+    <liquibase.version>4.30.0</liquibase.version>
     <spring-framework.version>6.2.1</spring-framework.version>
   </properties>