MINOR: Bump commons-io:commons-io from 2.19.0 to 2.21.0

Bumps [commons-io:commons-io](https://github.com/apache/commons-io) from 2.19.0 to 2.21.0.
- [Changelog](https://github.com/apache/commons-io/blob/master/RELEASE-NOTES.txt)
- [Commits](apache/commons-io@rel/commons-io-2.19.0...rel/commons-io-2.21.0)

---
updated-dependencies:
- dependency-name: commons-io:commons-io
  dependency-version: 2.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

dataset/pom.xml

@@ -156,7 +156,7 @@ under the License.
     <dependency>
       <groupId>commons-io</groupId>
       <artifactId>commons-io</artifactId>
-      <version>2.19.0</version>
+      <version>2.21.0</version>
       <scope>test</scope>
     </dependency>
     <dependency>

flight/flight-sql-jdbc-core/pom.xml

@@ -105,7 +105,7 @@ under the License.
     <dependency>
       <groupId>commons-io</groupId>
       <artifactId>commons-io</artifactId>
-      <version>2.19.0</version>
+      <version>2.21.0</version>
       <scope>test</scope>
     </dependency>