deps: Bump Golang

chris-crone · chris-crone · commit e81ea5b3e537 · 2020-12-24T12:17:14.000+01:00
Signed-off-by: Chris Crone &lt;christopher.crone@docker.com&gt;
diff --git a/Dockerfile b/Dockerfile
@@ -15,7 +15,7 @@
 #   See the License for the specific language governing permissions and
 #   limitations under the License.
 
-ARG GO_VERSION=1.15.5-alpine
+ARG GO_VERSION=1.15.6-alpine
 ARG GOLANGCI_LINT_VERSION=v1.33.0-alpine
 ARG PROTOC_GEN_GO_VERSION=v1.4.3
 
