Bump hairyhenderson/gomplate in /dockerfiles-builder
Bump hairyhenderson/gomplate in /dockerfiles-builder

Bumps hairyhenderson/gomplate from v3.7.0-slim to v3.8.0-slim.

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
hairyhenderson/dockerfiles