THRIFT-5855: Add rust fuzzers

Add fuzzers for Rust support, to improve the reliability/robustness of the implementation
diff --git a/FUZZING.md b/FUZZING.md
index a81dfe4..456c0b2 100644
--- a/FUZZING.md
+++ b/FUZZING.md
@@ -21,10 +21,10 @@
 - Java/JVM (and other JVM languages)
 - JavaScript
 - Python
+- Rust
 
 We are working on adding fuzzers for the following languages:
 
-- Rust  
 - Swift
 - netstd