Update run.sh

Author: jsvd

.ci/run.sh

@@ -6,7 +6,7 @@ env
 set -ex
 
 # Extract apacheKafkaVersion from gradle.properties
-export KAFKA_VERSION=$(grep "^apacheKafkaVersion" ../gradle.properties | cut -d'=' -f2)
+export KAFKA_VERSION=$(grep "^apacheKafkaVersion" gradle.properties | cut -d'=' -f2)
 ./kafka_test_setup.sh
 
 bundle exec rspec -fd