Switch to using snprintf instead of sprintf

tests/shell_commander/test_shell_commander.c

@@ -27,7 +27,7 @@ TestFuncResult test_commander_cmd_out_buf_success(void) {
   char expected_output[64] = {0};
   const char *msg          = "hello world";
   u64 length               = strlen(msg);
-  sprintf(expected_output, "%s\n", msg);
+  snprintf(expected_output, length + 2, "%s\n", msg);
 
   CMDResult result = wapp_shell_commander_execute(SHELL_OUTPUT_CAPTURE, buf, 64, "echo", msg);
   bool succeeded   = result.exited && result.exit_code == EXIT_SUCCESS &&