Update go version in build image to 1.16.6

This addresses CVE-2021-34558.

golang/go#47143

Signed-off-by: Christian Simon <[email protected]>

Author: simonswine

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## master / unreleased
 * [FEATURE] Ruler: Add new `-ruler.query-stats-enabled` which when enabled will report the `cortex_ruler_query_seconds_total` as a per-user metric that tracks the sum of the wall time of executing queries in the ruler in seconds. #4317
 
+* [CHANGE] Update Go version to 1.16.6. #4362
 * [CHANGE] Querier / ruler: Change `-querier.max-fetched-chunks-per-query` configuration to limit to maximum number of chunks that can be fetched in a single query. The number of chunks fetched by ingesters AND long-term storare combined should not exceed the value configured on `-querier.max-fetched-chunks-per-query`. #4260
 * [CHANGE] Memberlist: the `memberlist_kv_store_value_bytes` has been removed due to values no longer being stored in-memory as encoded bytes. #4345
 * [ENHANCEMENT] Add timeout for waiting on compactor to become ACTIVE in the ring. #4262

build-image/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.16.3-buster
+FROM golang:1.16.6-buster
 ARG goproxyValue
 ENV GOPROXY=${goproxyValue}
 RUN apt-get update && apt-get install -y curl python-requests python-yaml file jq unzip protobuf-compiler libprotobuf-dev && \