Fix typo in the fuzzer script

fuzz/fuzzers/fuzzer_script_1.rs

@@ -4,7 +4,7 @@ extern crate dtparse;
 use dtparse::parse;
 #[export_name="rust_fuzzer_test_input"]
 pub extern fn go(data: &[u8]) {
-    if let Ok(s) = sd::str::from_utf8(data) {
+    if let Ok(s) = std::str::from_utf8(data) {
         parse(s);
     }
 }