fix(cli): add shebang for kill-children.sh, closes #4262 (#4416)

Co-authored-by: Lucas Fernandes Nogueira <lucas@tauri.studio>

.changes/fix-cli-kill-children.md

@@ -0,0 +1,6 @@
+---
+"cli.rs": patch
+"cli.js": patch
+---
+
+Fix shebang for `kill-children.sh`.

tooling/cli/scripts/kill-children.sh

@@ -1,5 +1,7 @@
-function getcpid() {
-    cpids=`pgrep -P $1|xargs`
+#!/usr/bin/env sh
+
+getcpid() {
+    cpids=$(pgrep -P $1|xargs)
     for cpid in $cpids;
     do
         echo "$cpid"