deps(docker): bump mvdan/shfmt from v3.7.0 to v3.8.0 (#5257)

Bumps mvdan/shfmt from v3.7.0 to v3.8.0.

---
updated-dependencies:
- dependency-name: mvdan/shfmt
  dependency-type: direct:production
...

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

Dockerfile

@@ -18,7 +18,7 @@ FROM hadolint/hadolint:v2.12.0-alpine as dockerfile-lint
 FROM hashicorp/terraform:1.7.2 as terraform
 FROM koalaman/shellcheck:v0.9.0 as shellcheck
 FROM mstruebing/editorconfig-checker:2.7.2 as editorconfig-checker
-FROM mvdan/shfmt:v3.7.0 as shfmt
+FROM mvdan/shfmt:v3.8.0 as shfmt
 FROM rhysd/actionlint:1.6.26 as actionlint
 FROM scalameta/scalafmt:v3.7.17 as scalafmt
 FROM zricethezav/gitleaks:v8.18.2 as gitleaks