Fix typo - loki retention time

Author: mrnicegyu11

services/logging/template.env

@@ -16,7 +16,7 @@ GRAYLOG_LOG_MAX_DAYS_IN_STORAGE=${GRAYLOG_LOG_MAX_DAYS_IN_STORAGE}
 GRAYLOG_LOG_MIN_DAYS_IN_STORAGE=${GRAYLOG_LOG_MIN_DAYS_IN_STORAGE}
 PUBLIC_NETWORK=${PUBLIC_NETWORK}
 MONITORED_NETWORK=${MONITORED_NETWORK}
-LOKI_RETETION_PERIOD=${LOKI_RETETION_PERIOD}
+LOKI_RETENTION_PERIOD=${LOKI_RETENTION_PERIOD}
 S3_ENDPOINT_LOKI=${S3_ENDPOINT_LOKI}
 S3_ACCESS_KEY_LOKI=${S3_ACCESS_KEY_LOKI}
 S3_BUCKET_NAME_LOKI=${S3_BUCKET_NAME_LOKI}