Bump golang from 1.16.0-buster to 1.16.3-buster in /infra/docker/tripbot

Bumps golang from 1.16.0-buster to 1.16.3-buster.

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

infra/docker/tripbot/Dockerfile

@@ -1,5 +1,5 @@
 # buster is the debian release, c.p. https://askubuntu.com/a/445496
-FROM golang:1.16.0-buster
+FROM golang:1.16.3-buster
 
 WORKDIR /go/src/github.com/adanalife/tripbot