dt: Fixed lint with polaris

I didn't touch it so no idea how this snuck in.

Signed-off-by: Michael Boquard <[email protected]>

Author: michael-redpanda

tests/docker/ducktape-deps/polaris

@@ -5,4 +5,4 @@ git -C /opt clone https://github.com/apache/polaris.git
 cd /opt/polaris
 git reset --hard 1a6b3eb3963355f78c5ca916cc1d66ecd1493092
 ./gradlew --no-daemon --info shadowJar
-update-java-alternatives -s java-1.17.0-openjdk-amd64
+update-java-alternatives -s java-1.17.0-openjdk-amd64