Update dependency shfmt to v3.13.1

renovate[bot] · web-flow · commit be20efd66894 · 2026-04-07T01:06:07.000Z
diff --git a/.tool-versions b/.tool-versions
@@ -1,2 +1,2 @@
 shellcheck 0.11.0
-shfmt      3.12.0
+shfmt      3.13.1
