test(fuzz): Resolve deprecation

Author: epage

crates/toml_edit_fuzz/parse_document.rs

@@ -1,15 +1,15 @@
 #![no_main]
 
-use toml_edit::Document;
+use toml_edit::DocumentMut;
 
 libfuzzer_sys::fuzz_target!(|data| {
     if let Ok(data) = std::str::from_utf8(data) {
         println!("parsing: {data:?}");
-        let doc = data.parse::<Document>();
+        let doc = data.parse::<DocumentMut>();
         if let Ok(doc) = doc {
             let toml = doc.to_string();
             println!("parsing: {toml:?}");
-            let doc = toml.parse::<Document>();
+            let doc = toml.parse::<DocumentMut>();
             assert!(
                 doc.is_ok(),
                 "Failed to parse `doc.to_string()`: {}\n```\n{}\n```",