Use version from parent pom

Signed-off-by: Marvin Froeder <marvin@datasqrl.com>

Author: velo

connectors/postgresql-connector/pom.xml

@@ -31,7 +31,7 @@
     <dependency>
       <groupId>org.apache.flink</groupId>
       <artifactId>flink-connector-jdbc</artifactId>
-      <version>3.2.0-1.19</version>
+      <version>${jdbc.version}</version>
     </dependency>
     <dependency>
       <groupId>org.postgresql</groupId>

testing/system-functions-sample/pom.xml

@@ -31,7 +31,7 @@
     <dependency>
       <groupId>org.apache.flink</groupId>
       <artifactId>flink-table-common</artifactId>
-      <version>1.19.2</version>
+      <version>${flink.version}</version>
       <scope>provided</scope>
     </dependency>
     <dependency>