chore(deps): update mvdan/shfmt docker tag to v3.12.0 (#191)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Makefile

@@ -27,7 +27,7 @@ check-rust-formatting:
 	docker run $(DOCKER_RUN_OPTS) check-rust-formatting
 
 # renovate: depName=mvdan/shfmt
-SHFMT_VERSION=v3.11.0-alpine@sha256:394d755b6007056a2e6d7537ccdbdcfca01b9855ba91e99df0166ca039c9d422
+SHFMT_VERSION=v3.12.0-alpine@sha256:204a4d2d876123342ad394bd9a28fb91e165abc03868790d4b39cfa73233f150
 
 .PHONY: check-shell-formatting
 check-shell-formatting: