Bump alpine/terragrunt from 0.14.7 to 0.15.0 (super-linter#1501)

Bumps alpine/terragrunt from 0.14.7 to 0.15.0.

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

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

Dockerfile

@@ -13,7 +13,7 @@ FROM mstruebing/editorconfig-checker:2.3.5 as editorconfig-checker
 FROM yoheimuta/protolint:v0.31.0 as protolint
 FROM golangci/golangci-lint:v1.39.0 as golangci-lint
 FROM koalaman/shellcheck:v0.7.1 as shellcheck
-FROM alpine/terragrunt:0.14.7 as terragrunt
+FROM alpine/terragrunt:0.15.0 as terragrunt
 FROM wata727/tflint:0.28.0 as tflint
 FROM mvdan/shfmt:v3.2.4 as shfmt
 FROM accurics/terrascan:2d1374b as terrascan