deps: update module mvdan.cc/sh/v3/cmd/shfmt to v3.12.0 (#1132)

Author: renovate[bot]

.pre-commit-config.yaml

@@ -72,7 +72,7 @@ repos:
         name: shfmt
         description: Format shell scripts with shfmt
         language: golang
-        additional_dependencies: [mvdan.cc/sh/v3/cmd/shfmt@v3.8.0]
+        additional_dependencies: [mvdan.cc/sh/v3/cmd/shfmt@v3.12.0]
         entry: shfmt -i 2 -ci -sr -kp -w
         types: [shell]