Bump golang in /examples/deployment/docker/log_server (#3185)

Bumps golang from `deebfda` to `5bafbbb`.

---
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>

examples/deployment/docker/log_server/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.21.3-bookworm@sha256:deebfdaab16f8508e2590048d416b451e76ebe22e487cafd68990ff28f93ab1c as build
+FROM golang:1.21.3-bookworm@sha256:5bafbbb109f02aaf6b41ddc19f54919773c3006f1cbda1599112603367642f0e as build
 
 WORKDIR /trillian