Bump org.apache.flink:flink-core from 1.19.1 to 1.20.0

Bumps [org.apache.flink:flink-core](https://github.com/apache/flink) from 1.19.1 to 1.20.0.
- [Commits](apache/flink@release-1.19.1...release-1.20.0)

---
updated-dependencies:
- dependency-name: org.apache.flink:flink-core
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

extension/pom.xml

@@ -168,7 +168,7 @@
         <dependency>
             <groupId>org.apache.flink</groupId>
             <artifactId>flink-core</artifactId>
-            <version>1.19.1</version>
+            <version>1.20.0</version>
             <scope>test</scope>
         </dependency>
         <dependency>