Bump golang from 1.16.5-buster to 1.16.6-buster in /infra/docker/trip…

…bot (#209)

Bumps golang from 1.16.5-buster to 1.16.6-buster.

---
updated-dependencies:
- dependency-name: golang
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

infra/docker/tripbot/Dockerfile

@@ -1,5 +1,5 @@
 # buster is the debian release, c.p. https://askubuntu.com/a/445496
-FROM golang:1.16.5-buster
+FROM golang:1.16.6-buster
 
 WORKDIR /go/src/github.com/adanalife/tripbot