[FLINK-37236] Bump the flink version from 1.20.0 to 1.20.1

Author: 1996fanrui

pom.xml

@@ -83,7 +83,7 @@ under the License.
         <lombok.version>1.18.30</lombok.version>
         <commons-lang3.version>3.12.0</commons-lang3.version>
         <commons-io.version>2.17.0</commons-io.version>
-        <flink.version>1.20.0</flink.version>
+        <flink.version>1.20.1</flink.version>
 
         <slf4j.version>1.7.36</slf4j.version>
         <log4j.version>2.23.1</log4j.version>