Bump joda-time from 2.12.2 to 2.12.4 in /core

Bumps [joda-time](https://github.com/JodaOrg/joda-time) from 2.12.2 to
2.12.4.
- [Release notes](https://github.com/JodaOrg/joda-time/releases)
- [Changelog](https://github.com/JodaOrg/joda-time/blob/main/RELEASE-NOTES.txt)
- [Commits](https://github.com/JodaOrg/joda-time/compare/2.12.2...v2.12.4)

---
updated-dependencies:
- dependency-name: joda-time:joda-time
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Closes #564

Change-Id: Ib743dcd4d9bfbfcc142b12baecf1ffef196dbb2a
diff --git a/core/pom.xml b/core/pom.xml
index 1b692c9..47182e2 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -235,7 +235,7 @@
 		<dependency>
 			<groupId>joda-time</groupId>
 			<artifactId>joda-time</artifactId>
-			<version>2.12.2</version>
+			<version>2.12.4</version>
 		</dependency>
 		<dependency>
 			<groupId>de.ids_mannheim.korap</groupId>