chore(deps): bump alpine/helm from 3.4.2 to 3.5.4

Bumps alpine/helm from 3.4.2 to 3.5.4.

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

Dockerfile

 FROM docker.io/hashicorp/terraform:0.14.2@sha256:fb74c7a3a4b21e1a4044174413872e4225dfe85c287174c00b4a6bc66382d5fe AS terraform
 FROM docker.io/hashicorp/packer:1.6.6@sha256:523457b5371562c4d9c21621ee85c71c31e7ff53d5ec303a5daf07c55531b84e AS packer
-FROM docker.io/alpine/helm:3.4.2@sha256:298397182125f0772a0802fc658031893b4e249e7a524a2e3b3a662a842dfad9 AS helm
+FROM docker.io/alpine/helm:3.5.4@sha256:e539a1a27a90ac844f306ac00096228c963c5b9e11b4614336fd9412d1512f5b AS helm
 FROM docker.io/alpine:3.12@sha256:074d3636ebda6dd446d0d00304c4454f468237fdacf08fb0eeac90bdbfa1bac7
 
 LABEL maintainer="simon@lauger.name"