Update dependency shfmt to v3.9.0

renovate[bot] · web-flow · commit 9286290e0181 · 2024-10-02T13:52:50.000Z
diff --git a/.tool-versions b/.tool-versions
@@ -1,3 +1,3 @@
 golang 1.22.5
-shfmt 3.8.0
+shfmt 3.9.0
 shellcheck 0.10.0
