Bump alpine from 3.16.2 to 3.16.3 in /.ci/releaser/alpine (#954)

Bumps alpine from 3.16.2 to 3.16.3.

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

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.ci/releaser/alpine/Dockerfile

@@ -1,6 +1,6 @@
 # Initially copied from
 # https://github.com/jordansissel/fpm/blob/master/Dockerfile
-FROM alpine:3.16.2
+FROM alpine:3.16.3
 
 SHELL ["/bin/ash", "-eo", "pipefail", "-c"]