Fix typo

Author: ga-ram

pinpoint-agent/Dockerfile

@@ -2,7 +2,7 @@ FROM alpine:3.7
 
 LABEL maintainer="Roy Kim <[email protected]>"
 
-ARG PINPOINT_VERSION=${PINPOINT_VERSION:-2}
+ARG PINPOINT_VERSION=${PINPOINT_VERSION:-2.3.2}
 ARG INSTALL_URL=https://github.com/naver/pinpoint/releases/download/v${PINPOINT_VERSION}/pinpoint-agent-${PINPOINT_VERSION}.tar.gz
 
 COPY /build/scripts/configure-agent.sh /usr/local/bin/