Update dependency org.jsoup:jsoup to v1.21.2 (#3463)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

flink-docs/pom.xml

@@ -190,7 +190,7 @@ under the License.
 			<!-- Used for parsing HTML -->
 			<groupId>org.jsoup</groupId>
 			<artifactId>jsoup</artifactId>
-			<version>1.21.1</version>
+			<version>1.21.2</version>
 			<scope>test</scope>
 		</dependency>
 	</dependencies>