Update Changelog

ChangeLog.md

@@ -20,6 +20,14 @@ See docs/process.md for more on how version tagging works.
 
 3.1.75 (in development)
 -----------------------
+- The Wasm nontrapping-fptoint feature has been enabled by default. clang will
+  generate nontrapping (saturating) float-to-int conversion instructions for
+  C typecasts. This should have no effect on programs that do not have
+  undefined behavior but if the casted floating-point value is outside the range
+  of the target integer type, the result will be a number of the max or min value
+  instead of a trap. This also results in a small code size improvement because
+  of details of the LLVM IR semantics. This feature can be disabled in clang with
+  the -mno-nontrapping-fptoint flag. (#23007)
 - The `WASM_BIGINT` feature has been enabled by default. This has the effect that
   Wasm i64 values are passed and returned between Wasm and JS as BigInt values
   rather than being split by Binaryen into pairs of Numbers. (#22993)